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- Multiple ChoicePlease save your changes before editing any questions.
Chemistry is a branch of science to study
(I) Interactions between matter
(II) Structure of matter
(III) Composition of matter
(IV) Properties of matter
I, II, and III
I, II, and IV
II, III, and IV
I, II, III, and IV
- Multiple ChoicePlease save your changes before editing any questions.
If you're determining the energy transfer when water boils what branch of chemistry are you working in?
Analytical chemistry
Physical chemistry
Organic chemistry
Biochemistry
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________ chemistry is directed to a practical goal or application.
Pure chemistry
Analytical chemistry
Physical chemistry
Applied chemistry
- Multiple ChoicePlease save your changes before editing any questions.
The branch of chemistry which deals with the study of carbon compounds is ?
Biochemistry
Organic Chemistry
Inorganic Chemistry
Polymer Chemistry
Physical Chemistry
- Multiple ChoicePlease save your changes before editing any questions.
The study of the composition, structure, and properties of matter and the changes it undergoes.
Chemistry
Physics
Biology
Social Science
- Multiple ChoicePlease save your changes before editing any questions.
This water is changing from a liquid to a gas via _______.
vaporization
boiling
evaporation
condensation
- Multiple ChoicePlease save your changes before editing any questions.During the process of condensation, a gas is _______ down to a liquid.gettingsmellingheatingcooling
- Multiple ChoicePlease save your changes before editing any questions.If the tops were removed from the cylinders, the following would happen:The solid would fly out of the containerThe liquid would fly out of the container.The gas would fly out of the container.They ALL would fly out of the container.
- Multiple ChoicePlease save your changes before editing any questions.The freezing point of water in oCelsius and oFahrenheit is:100oC or 212oF0oC or 32oFWRONGWRONG
- Multiple ChoicePlease save your changes before editing any questions.This image shows:Molecules in solid have the greatest amount of energy.Molecules in a liquid have the greatest amount of energy.Molecules in a gas have the greatest amount of energy.They have equal amounts of energy.
- Multiple ChoicePlease save your changes before editing any questions.When a solid changes into a liquid, it is called ......freezingsublimationmeltingboiling
- Multiple ChoicePlease save your changes before editing any questions.TRUE/FALSE: Boiling and evaporation are both types of vaporization.TRUEFALSE
- Multiple ChoicePlease save your changes before editing any questions.
The type of separation that would be appropriate if you needed to separate solid particles from a liquid is....
Distillation
Filtration
Separation funnel
Crystallization
- Multiple ChoicePlease save your changes before editing any questions.
Which are methods of separating dissolved particles from the liquid they are dissolved in?
Filtration, separation funnel, crystallization
Filtration, distillation, crystallization
Evaporation, filtration, crystallization
Evaporation, distillation, crystallization
- Multiple ChoicePlease save your changes before editing any questions.
What separation method is used to separate substances by their boiling point?
Filtration
Evaporation
Crystallization
Distillation
- Multiple ChoicePlease save your changes before editing any questions.
What is the physical property used to separate substances using the method of evaporation?
Boiling point
Melting point
Volatility
Particle size
- Multiple ChoicePlease save your changes before editing any questions.
In which mixture can you see all of the parts?
homogeneous
heterogeneous
- Multiple ChoicePlease save your changes before editing any questions.
In which mixture can you not see all of the parts?
homogeneous
heterogeneous
- Multiple ChoicePlease save your changes before editing any questions.
Trail mix
Solution
Mixture
- Multiple ChoicePlease save your changes before editing any questions.
The smallest particle of an element that still represents that element.
Nucleus
electron
proton
atom
- Multiple ChoicePlease save your changes before editing any questions.
What is a particle with one negative charge called?
electron
proton
quark
neutron
- Multiple ChoicePlease save your changes before editing any questions.
What is a particle with one positive charge called?
proton
electron
neutron
quark
- Multiple ChoicePlease save your changes before editing any questions.
What is the center of an atom called?
nucleus
electron cloud
proton center
photon center
- Multiple ChoicePlease save your changes before editing any questions.What is the number of protons that the element in this image contain?1471518
- Multiple ChoicePlease save your changes before editing any questions.When an atom loses a valence electron, it becomes a(n) _____________ ion.positivenegativeneutralpolyatomic
- Multiple ChoicePlease save your changes before editing any questions.How many valence electrons in this structure?6547
- Multiple ChoicePlease save your changes before editing any questions.Which subatomic particles contribute the most to the mass of an atom?Protons, Neutrons, ElectronsProtons onlyProtons and ElectronsProtons and Neutrons
- Multiple ChoicePlease save your changes before editing any questions.In terms of matter, the atom is almost entirely filled with _____orbiting electronscharged protonsheavy neutronsempty space
- Multiple ChoicePlease save your changes before editing any questions.Of the three subatomic particles, which is the smallest and the lightest?protonsneutronselectronsThey are all equal.
- Multiple ChoicePlease save your changes before editing any questions.An atom has 5 protons and 7 neutrons. What is the mass number of the atom?57212
- Multiple ChoicePlease save your changes before editing any questions.The atomic number is always the number of ...neutrons.electrons.ions.protons.
- Multiple ChoicePlease save your changes before editing any questions.
The first energy level, or valence shell can hold up to how many electrons?
8
4
2
5
- Multiple ChoicePlease save your changes before editing any questions.
How many protons does an atom of Sodium (Na) have?
12
11
23
- Multiple ChoicePlease save your changes before editing any questions.What elements generally make an ionic bond?metal and nonmetal2 nonmetalsmetalnone of the above
- Multiple ChoicePlease save your changes before editing any questions.What elements generally make a covalent bond?metal and nonmetal2 nonmetalsmetalnone of the above
- Multiple ChoicePlease save your changes before editing any questions.In chemical compounds, covalent bonds form whenthe electronegativity difference between two atoms is very large.electrons are completely transferred between two metals.pairs of electrons are shared between two nonmetal atoms.two nonmetal atoms are attracted to each other by opposite charges.
- Multiple ChoicePlease save your changes before editing any questions.Predict the bond that will form between Be and F.IonicCovalent
- Multiple ChoicePlease save your changes before editing any questions.What happens when an atom loses an electron?It becomes Negatively ChargedIt remains neutral because the proton also leaves.It becomes Positively ChargedIt stays the same.
- Multiple ChoicePlease save your changes before editing any questions.If an oxygen atom has 8 protons (+) and 10 electrons (-), what is it's charge?O10-O8+O2-O10+
- Multiple ChoicePlease save your changes before editing any questions.
1. Are the atoms more stable when they are bonded together or when they are apart?
Bonded Together
Apart
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6. What usually forms the negative ion?
Nonmetals
Metal
None
- Multiple ChoicePlease save your changes before editing any questions.
10. What charges attract?
Opposite
Same
- Multiple ChoicePlease save your changes before editing any questions.
13. What elements generally make a covalent bond?
metal and nonmetal
2 or more nonmetals
metal
none of the above
- Multiple ChoicePlease save your changes before editing any questions.
16. What is the number of valence electrons for Calcium (Group 2)?
1
2
3
4
- Multiple ChoicePlease save your changes before editing any questions.
17. What is the number of valence electrons for Carbon (Group 14)?
1
2
3
4
- Multiple ChoicePlease save your changes before editing any questions.
20. If I was trying to determine if two atoms will bond, what would be helpful to know:
Valence electrons, found by group number
Whether the elements are metals or nonmetals
The electronegativity of the atoms
All of the above, all of which can be found on the Periodic Table
- Multiple ChoicePlease save your changes before editing any questions.
A positively or negatively charged particle.
covalent bond
ion
oxidation number
subscript
- Multiple ChoicePlease save your changes before editing any questions.
Metal atoms drift free from one side to another forming a ____________________________
sea of electrons
sea of ions
sea of molecules
sea of compounds
- Multiple ChoicePlease save your changes before editing any questions.
An ion that is negative is called a ____________________.
polar ion
nonpolar ion
anion
cation
- Multiple ChoicePlease save your changes before editing any questions.
An ion that is positively charged is called a ________________.
polar ion
cation
anion
positive ion
- Multiple ChoicePlease save your changes before editing any questions.How many elements are in C6H12O6?1234
- Multiple ChoicePlease save your changes before editing any questions.How many atoms of carbon (C) are in C6H12O6?361224
- Multiple ChoicePlease save your changes before editing any questions.Element or compound?
H2Oelementcompound - Multiple ChoicePlease save your changes before editing any questions.How many atoms are there TOTAL in:
H2SO46573 - Multiple ChoicePlease save your changes before editing any questions.Chemical reactions occur when _________ are broken and new bonds are formed.mixturesosteoclastsphysical bondschemical bonds
- Multiple ChoicePlease save your changes before editing any questions.Balance this equation...
HgO --> Hg + O2It is balanced2HgO --> Hg + O22HgO --> 2Hg + O2 - Multiple ChoicePlease save your changes before editing any questions.Balance this equation...
H2 + Cl2 --> HClIt is balanced3H2 + Cl2 --> 6H2ClH2 + Cl2 --> 2HCl - Multiple ChoicePlease save your changes before editing any questions.
Which are the reactants in the following reaction?
2Mg + O2 ---> 2MgO
Mg and O2
MgO
Mg and MgO
O2 and MgO
- Multiple ChoicePlease save your changes before editing any questions.How many oxygens are in Al₂(SO₄)₃?412724
- Multiple ChoicePlease save your changes before editing any questions.
Which of the following is NOT an indication of a chemical reaction?
new gas formed
temperature change
new smell detected
two liquids form a mixture
- Fill in the BlankPlease save your changes before editing any questions.
Is the equation balanced (yes or no)?
- Multiple ChoicePlease save your changes before editing any questions.
What state of matter is this substance?
solid
liquid
gas
aqueous
- Multiple ChoicePlease save your changes before editing any questions.
Identify the Reactants in this equation.
A
B
- Multiple ChoicePlease save your changes before editing any questions.
Identify the number in blue.
Product
Reactant
Coefficient
Subscript
- Multiple ChoicePlease save your changes before editing any questions.
In what state is this substance?
solid precipitate
dissolved in water
released as a gas
liquid
- Multiple ChoicePlease save your changes before editing any questions.
Is the following equation balanced?
4Fe + 3O2 ---> 2Fe2O3
YES
NO
- Multiple ChoicePlease save your changes before editing any questions.
Is the following equation balanced?
2C2H2 + 5O2 ---> 4CO2 + 2H2O
YES
NO
- Multiple ChoicePlease save your changes before editing any questions.
Is the following equation balanced?
NaHCO3 ---> Na2CO3 + H2O + CO2
YES
NO
- Multiple ChoicePlease save your changes before editing any questions.
Is the following reaction balanced?
2CH3OH + 3O2 ---> 2CO2 + 4H2O
YES
NO
- Multiple ChoicePlease save your changes before editing any questions.
Which of the following equations are correctly balanced?
12CO2 + H2O ---> C6H12O6 + O2
CO2 + H2O ---> 3C6H12O6 + O2
CO2 + 9H2O ---> C6H12O6 + O2
6CO2 + 6H2O ---> C6H12O6 + 6O2
- Multiple ChoicePlease save your changes before editing any questions.
Balanced this equation:
Sb2S3 + O2 ---> Sb + SO2
It is balanced.
Sb2S3 + O2 ---> 2Sb + SO2
Sb2S3 + 3O2 ---> 2Sb + 3SO2
3Sb2S3 + 3O2 ---> 2Sb + SO2