Ionic and Covalent

How many valence electrons does calcium have?

• 2
• 4
• 6
• 7

How many valence electrons does hydrogen have?

• 1
• 2
• 3
• 4

When an atom loses an electron, it becomes a:

• positive ion
• negative ion
• neutral ion
• neutral atom

How are covalent bonds explained?

• When one atom takes the other atom's electron
• When the atom shares an electron with an another atom
• When the two nucleus merge
• When the neutrons leave the nucleus

Tags

NGSS.HS-PS1-1

What two types of atoms make a covalent bond?

• 2 Nonmetals
• 1 Nonmetal and 1 Metal
• 2 Metals
• 2 Noble Gases

How many valence electrons do most atoms need to be stable?

• 1
• 2
• 6
• 8

Where are the nonmetals located on the periodic table? 

• Blue
• Red
• Green

Tags

NGSS.MS-PS1-1

What is the correct formula for this molecule?

• NH
• N₃H
• NH₃
• NH₄

Tags

NGSS.MS-PS1-1

Energy is released when

• valence electrons are removed from an atom

• valence electrons are gained by an atom

• a positive ion forms

• A and B

Tags

NGSS.HS-PS1-4

True or False: An ionic bond forms when atoms of a non-metal give up electrons to atoms of a metal

• True

• False