CR2 Quiz

A positively charged particle is

• a neutron

• a proton

• a quark

• an electron

Tags

NGSS.MS-PS2-3

An atom becomes an ion by

• losing or gaining protons

• losing or gaining neutrons

• losing or gaining electrons

• all of these

A cation is

• an atom that has lost electrons and has become positively charged

• an atom that has gained electrons and has become negatively charged

• an atom that is sharing electrons

• an atom that has lost protons

What typically happens to metals in a chemical reaction?

• They gain electrons

• They lose electrons

• They gain protons

• They lose protons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How can you tell how many valence electrons an atom has?

• By the atomic number

• By the mass number

• By the group number

• By the period number

Nonmetals tend to ___________ electrons and have a _____________________ charge.

• lose, positive

• gain, positive

• lose, negative

• gain, negative

Atoms in Group 1 have ______ valence electron(s).

• 1

• 2

• 3

• 4 or more

What is the octet rule?

• Atoms try to fill up their outer orbitals with 8 electrons by gaining or losing electrons.

• Atoms try to fill up their outer orbitals with 8 electrons by gaining or losing protons.

• Atoms try to fill up their outer orbitals with 8 electrons by gaining or losing neutrons.

• Atoms are trying to fill up their nucleus with 8 particles.

Which of the following applies to Noble Gases? (there may be more than one answer)

• they have full orbitals

• they are stable

• they rarely react

• all other elements in other groups are trying to be like them

What is a Lewis Structure?

• It shows the number of protons an element has as dots around its symbol.

• It shows the number of neutrons an atom has as dots in orbitals.

• It shows the number of protons an atom has as dots in the nucleus.

• It shows the number of valence electrons an atom has as dots around its symbol.