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- 1. Multiple Choice
Atoms of which two elements have a combined total of 23 protons?
Sodium, Na, and magnesium, Mg
Boron, B, and carbon, C
Copper, Cu, and zinc, Zn
None of these
- 2. Multiple Choice
A scientist performs tests on a sample of an element. The element is a shiny solid that conducts electricity and heat. The scientist is able to bend and flatten the sample when
pressure is applied to it.
Based on this information, the element could NOT be a member of which group on the
periodic table?
Group 2
Group 8
Group 12
Group 18
- 3. Multiple Choice
The atomic number of krypton is 36. If the mass number of a krypton atom is 84, which answer shows the number of subatomic particles inside and outside the nucleus of the krypton atom?
Number of Particles Inside Nucleus 36
Number of Particles Outside Nucleus 36
Number of Particles Inside Nucleus 36
Number of Particles Outside Nucleus 48
Number of Particles Inside Nucleus 84
Number of Particles Outside Nucleus 36
Number of Particles Inside Nucleus 84
Number of Particles Outside Nucleus 48
- 4. Multiple Choice
The diagram shows a model of an atom. The model has four different symbols on it. Each symbol represents a different role for one of the particles within the atom. In this model, which particle determines the reactivity of this atom?
Particle W
Particle X
Particle Y
Particle Z
- 5. Multiple Choice
Element R and Element Q have the same number of valence electrons. These elements both have similar chemical behavior, but Element R has fewer energy levels than Element Q. Which statement best describes the positions of the two elements in the periodic table?
The two elements are in the same period, with Element R the first element in the period and Element Q the last element.
The two elements are side by side in the same period, with Element Q to the left of Element R.
The two elements are in the same group, with Element R just above Element Q.
The two elements are in the same group, with Element Q at the top of the group and Element R at the bottom.
- 6. Multiple Choice
Four students were asked to name the parts of an atom that determine the atom’s identity and chemical properties. The students’ responses are shown in the table. Which student’s responses are correct?
student 1
student 2
student 3
student 4
- 7. Multiple Choice
How many protons, neutrons, and electrons are present in an atom of hafnium, Hf, with a mass number of 178?
72 protons, 178 neutrons, 106 electrons
72 protons, 106 neutrons, 72 electrons
178 protons, 250 neutrons, 72 electrons
106 protons, 72 neutrons, 106 electrons
- 8. Multiple Choice
Tin, Sn, is a soft white metal. It has a low melting point compared with other metals. Tin is widely used as a coating for cans of food. Which statement accurately describes atoms of tin?
Tin atoms have 50 protons.
Tin atoms have five valence electrons.
Tin atoms have 119 neutrons.
Tin atoms have 68 electrons.
- 9. Multiple ChoiceAn element's identity is determined by the number ofelectrons.protons.neutrons.valence.
- 10. Multiple ChoiceHow many Valance electrons does Iodine Have?616717
- 11. Multiple ChoiceWhich of the following has six valence electrons?SodiumIodineOxygenNeon
- 12. Multiple Choice
Which statement is accurate regarding subatomic particles?
electrons are the heaviest particle, with a positive charge
protons and electrons are equal in mass with positive charges
electrons are neutral with the least mass
protons have a positive charge with a mass of 1 amu and neutrons are neutral with the same mass as a proton
- 13. Multiple Choice
The atomic number will always be the same as
Mass number and number of protons
Number of neutrons and protons
number of electrons and protons
Number of electrons and neutrons
- 14. Multiple Choice
Found in the nucleus of an atom. This particle has a positive charge.
Neutron
Proton
Electron
Decepticon
- 15. Multiple Choice
Found orbiting outside the nucleus, this subatomic particle has a negative charge.
Neutron
Proton
Electron
Idontknowatron
- 16. Multiple Choice
Found in the nucleus of an atom, this subatomic particle has a neutral (or no ) charge
Neutron
Proton
Electron
Whattheheckatron
- 17. Multiple Choice
Name the element
Aluminum
Silicon
Phosphorus
Sulfur
- 18. Multiple Choice
It stacks the elements in columns according to the number of valence electrons in an atom of the element. Valence electrons are those in the outermost shell of the atom and the ones that participate in reactions. The number of valence electrons is associated with the element’s reactivity. Elements with the same number of valence electrons behave in a similar way in reactions and so are grouped together in the same column on the periodic table.
What does the amount of valance electrons determine about an element?
Its row in the table.
Its atomic number.
Its atomic mass.
Its reactivity with other elements.
- 19. Multiple Choice
In the periodic table, similar elements are arranged in vertical columns called groups. Some of the major groups include Group 1: alkali metals; Group 2: alkaline earth metals; Group 17: halogens; and Group 18: noble gases. Elements within each group have similar properties and characteristic behaviors because of their similar numbers of valence electrons.
In what direction are groups arranged in the periodic table?
Side to side
Up and down.
Diagonally
In sections.
- 20. Multiple Choice
Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), and Cesium (Cs) are all in the same column (group) on the periodic table. Why are they all grouped together?
They all end with the letters (ium)
They share the same characteristics.
They are in alphabetical order
That is where they just happen to be on the periodic table and are not grouped for any particular reason.
- 21. Multiple Choice
I have the same number of energy levels as potassium.
Sodium
Magnesium
Calcium
rubidium
- 22. Multiple ChoiceThe maximum number of electrons in the third energy level of an atom istwofoureightten
- 23. Multiple ChoiceSodium (Na) and potassium (K) are in the same group on the periodic table. Based on their locations, which statement about sodium and potassium is true?Sodium is less electronegative than potassium.Sodium has fewer energy levels than potassium.Sodium has a larger ionic radius than potassium.Sodium has lower ionization energy than potassium.
- 24. Multiple ChoiceBased on their locations in the periodic table, which element has chemical properties most similar to those of calcium, Ca?beryllium, Bepotassium, Ktitanium, Tiyttrium, Y
- 25. Multiple ChoiceThe number of valence electrons in an element affects the reactivity of that element. Which element listed has the fewest valence electrons?beryllium (Be)sodium (Na)oxygen (O)neon (Ne)
- 26. Multiple Choice
Fluorine, chlorine, bromine, iodine, and astatine make up Group 17. Why are these elements grouped together?
They are all very reactive nonmetals with similar chemical properties.
They are all nonreactive gases with similar physical properties.
Their atoms all have eight electrons in their outer energy levels.
They all have the same atomic number.
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