Grade 8-Review chemical bonds

The force that holds atoms together is called

a(n) _______

You can predict the number of bonds an atom

can form by drawing its ___________

The nitrogen and hydrogen atoms that make

up ammonia (NH3) are held together by a(n)____________

because the atoms share valence

electrons unequally.

Two hydrogen atoms and one oxygen atom

together are a ___________ of water.

Tags

NGSS.MS-PS1-1

A positively charged sodium ion and a

negatively charged chlorine ion are joined

by a(n) _____________ to form the compound

sodium chloride.

Atoms lose, gain, or share electrons and

become as chemically stable as

• an electron.

• an ion.

• a metal.

• a noble gas.

If an electron transfers from one atom to

another atom, what type of bond will most

likely form?

• covalent

• ionic

• metallic

• polar

Tags

NGSS.HS-PS1-2

What would make bromine, a group 17

element, more similar to a noble gas?

• gaining one electron

• gaining two electrons

• losing one electron

• losing two electrons

How many dots would a dot diagram for

selenium, one of the group 16

elements, have?

• 6

• 8

• 10

• 16

Which group of elements on the periodic

table forms covalent compounds with other

nonmetals?

• group 1

• group 2

• group 17

• group 18