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- Math ResponsePlease save your changes before editing any questions.
What is the mass of the Chlorine gas?
2NaCl + F2 ➜ 2NaF + Cl2
5.4g + 3.2g = 4.9g + ____g
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In the equation for burning magnesium (2Mg + O2 -> 2MgO) what are the products? (a)
2MgO22Mg + O22MgO - Drag and DropPlease save your changes before editing any questions.
In what state of matter are the atoms moving the slowest? (a)
SolidLiquidGasPlasma - Multiple ChoicePlease save your changes before editing any questions.
How does adding heat affect liquid water?
it becomes a solid
its molecules move faster
new substances form
a color change is produced
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What is the symbol for Hydrogen? (a)
HyHeHN - Drop DownPlease save your changes before editing any questions.
What is a positivly charge atom called? (a)
cationanion - Drag and DropPlease save your changes before editing any questions.
What is a negatively charged atom called? (a)
AnionCationIon - Multiple ChoicePlease save your changes before editing any questions.
What is a valence electron?
an electron that is found in the outermost shell of an atom.
an electron found in the innermost shell of an atom.
an electron found in the middle shell.
- Multiple ChoicePlease save your changes before editing any questions.
What are the reactants in the chemical equation pictured?
CH4 and CO2
CH4 and O2
CO2 and H2O
O2 and H2O
- Multiple ChoicePlease save your changes before editing any questions.What is a coefficient?The small number on the right of the chemical symbol.The large number to the left of a formula.
- Multiple ChoicePlease save your changes before editing any questions.What does the Law of Conservation of Mass state?Matter cannot be gained or lost in a chemical reaction.Matter can only be lost in a chemical reaction.Matter can only be gained in a chemical reaction.Matter can be gained and lost in a chemical reaction.
- Math ResponsePlease save your changes before editing any questions.
How many valence electron does Beryllium have?
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Which subatomic particle has NO CHARGE? (a)
ProtonsNeutronsElectronsNucleus - Drag and DropPlease save your changes before editing any questions.
Which subatomic particle has a POSITIVE charge? (a)
ProtonsNeutronsElectronsNucleus - Drop DownPlease save your changes before editing any questions.
Which subatomic particle has a NEGATIVE charge? (a)
ProtonsNeutronsElectronsNucleus - Drag and DropPlease save your changes before editing any questions.
Which subatomic particle tells you the identity of the Element? (a)
ProtonsNeutronsElectronsNucleus - Multiple ChoicePlease save your changes before editing any questions.
What is the name for this group of elements?
Alkali
Halogens
Noble Gases
Alkali-Earth
- Math ResponsePlease save your changes before editing any questions.
In the formula 2C6H12O6, what is the Coefficient?
- Multiple ChoicePlease save your changes before editing any questions.
Anything that has mass and takes up space.
atom
colloid
compound
matter
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This could be the dot diagram of (a)
Mg, group 2.Cl, group 17.C, group 14.O, group 16. - Multiple ChoicePlease save your changes before editing any questions.Signs that a chemical change has occurred includea change in colorthe release of bubblesthe production of an odorall of the above
- Multiple ChoicePlease save your changes before editing any questions.The density of water is.1 g/cubic cm10g/cubic cm1.0 g/cubic cm0 g/cubic cm
- Math ResponsePlease save your changes before editing any questions.What is the number of protons that the element in this image contain?
- Multiple ChoicePlease save your changes before editing any questions.What two types of measurements make up DENSITY?Mass and VolumeTemperature and MassGrams and CentimetersVolume and Weight
- Multiple ChoicePlease save your changes before editing any questions.The easiest way to tell if a change is physical or chemical is to ask yourself?Did it break?Did it change color?Did it create a new substance?Did it look cool?
- Drop DownPlease save your changes before editing any questions.
Balanced or Unbalanced? (a)
BalancedUnbalanced - Multiple ChoicePlease save your changes before editing any questions.What does the nucleus of an atom contain?Electrons and neutronsProtons and neutronsNeutrinos and positronsDNA and RN
- Multiple ChoicePlease save your changes before editing any questions.
How does thermal energy play a role in particle motion and changes of state?
Thermal energy is a term that refers to temperature
Increasing an object's thermal energy increases particle motion and can cause a change of state.
Decreasing an object's thermal energy increases particle motion and can cause a change of state.
Thermal energy is the energy added from a heat source.
- Multiple ChoicePlease save your changes before editing any questions.
How many oxygen atoms are in this chemical formula?
6 oxygen atoms
2 oxygen atoms
3 oxygen atoms
4 oxygen atoms
- Multiple ChoicePlease save your changes before editing any questions.The horizontal row on the periodic table is called agroupfamilyperiodatomic number
- Multiple ChoicePlease save your changes before editing any questions.The atoms along the staircase are calledmetalsnonmetalsmetalloidsnoble gases
- Multiple ChoicePlease save your changes before editing any questions.
Ions form because atoms either gain or lose
electrons
protons
neutrons
quarks
- Multiple ChoicePlease save your changes before editing any questions.
Evidence that a chemical reaction has occurred includes which of the following?
change in color
sudden temperature change
formation of a precipitate
a change of state
- Multiple ChoicePlease save your changes before editing any questions.
The most reactive metals are in which group?
The Alkali Metals
The Alkaline Earth Metals
The Boron Group
The Transition Metals
- Multiple ChoicePlease save your changes before editing any questions.In an exothermic reaction, heat is ...taken ingiven out
- Multiple ChoicePlease save your changes before editing any questions.
In an endothermic reaction, heat is ...
taken in
given out
- Multiple ChoicePlease save your changes before editing any questions.
A substance that increases the rate of a reaction without being used up during the reaction is called a
catalyst
product
reactant
solute
- Multiple ChoicePlease save your changes before editing any questions.In what type of bond are electrons gained or lost? This happens between a metal and a non-metal?ioniccovalentsubatomic
- Multiple ChoicePlease save your changes before editing any questions.In this type of bond electrons are shared by two non-metalsioniccovalentsubatomic
- Multiple ChoicePlease save your changes before editing any questions.The Law of Conservation of Matter saysMatter can be created, but not destroyedmatter can be destroyed, but not createdmatter cannot be created or destroyed