Unit 7: Chemical Bonds Test

When an atom loses an electron, it becomes a

• neutral atom

• positive ion

• negative ion

• neutral ion

When an atom gains an electron, it becomes a

• neutral atom

• positive ion

• neutral ion

• negative ion

Elements in Group 1 lose one electron to form ions with a(n) ___________ charge.

• 0

• 1-

• 1+

• 2+

Ionic bonds form between metals and _________.

• metals

• nonmetals

• metalloids

What type of bond is this?

• covalent

• ionic

• metallic

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

A charged particle that has gained or lost electrons is called a _______.

• molecule

• element

• isotope

• ion

Tags

NGSS.MS-PS2-5

How many electrons are needed in the outer energy levels of an atom to be stable?

• 2

• 8

• 4

• 6

What is a valence electron?

• a popular compound

• a type of bond

• the number of electrons in the last shell.

• the sum of neutrons and protons

Ionic bonds are between...

• Nonmetal and Nonmetal

• Metal and Metal

• Metal and Nonmetal

How are covalent bonds formed?

• Sharing of electrons

• Transfer of electrons