Chemistry Atoms

The following things are shown for each element on the periodic table.

• Atomic mass

• Atomic number

• Chemical symbol

• Compound formula

Which are true?

• Two elements can have the same number of protons.

• Two elements can have the same number of electrons.

• Two elements can be made of the same type of atom.

• None of the above are true.

Which of the following is an element?

• air

• iron

• salt

• sugar

Hydrogen

• He

• H

• Li

• Be

Sodium

• F

• Na

• Ne

• Mg

Which period are Hydrogen and Helium in?

• 1

• 5

• 18

• A

Electrons, Protons and Neutrons are ___________.

• Are made in stars

• Chemistry

• Subatomic particles

• Elements

all matter is made of what 

• energy 

• atoms 

• electrons 

• compounds 

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

an atom with atomic number 6 would have how many protons 

• 6

• 12

• 3

• cannot be determined 

Tags

NGSS.MS-PS1-1

How many protons does this atom have?

• 2.5

• 6

• 5

• 10.811