_____________________ are responsible for bonding.

• Neutrons

• Protons

• Electrons

• Valence electrons

The atomic mass of an atom is equal to:

• # of protons + # of neutrons

• # of protons + # of electrons

• # of neutrons + # of electrons

• # of neutrons

_________________ determine the identity of an atom.

• protons

• neutrons

• electrons

• quarks

Every element in the second column of the periodic table has _____ valence electrons

• 4

• 2

• 3

• 7

______________ are usually solids at room temperature.

• metals

• nonmetals

• metalloids

Which of the following is a property of nonmetals?

• poor conductors

• shiny

• high melting point

• malleable

Which of the following is a property of metals?

• low melting point

• brittle

• ductile

• dull

________________ show only the valence electrons of an atom, whereas ___________________ show all the electrons of an atom.

• Bohr Models; Lewis Dot Diagrams

• Lewis Dot Diagrams; Bohr Models

• Bohr Models; Electron Shells

• Electron Shells; Lewis Dot Diagrams

The first shell of electrons can hold a maximum of _____, while all other shells can hold a maximum of ________.

• 8; 8

• 2; 8

• 8; 2

• 2; 6

Noble gases are unreactive because:

• they have the same number of protons

• the have different numbers of electrons

• they are all gases

• they all have a full valence shell

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2