Atomic Number & Groups

The atomic number is the same as the:

• electrons

• neutrons

• protons

• atomic mass

Look at the image. What is the atomic number for carbon?

• 12.011

• 6

• 7

• 8

Tags

NGSS.MS-PS1-1

Look at the image. How many protons does carbon have?

• 12.011

• 6

• 4

• 5

Tags

NGSS.MS-PS1-1

The atomic number and protons for carbon is 6. Is this true or false?

• true

• false

Tags

NGSS.MS-PS1-1

Look at the image. What is the atomic number for oxygen?

• 15.999

• 16

• 8

• 9

Tags

NGSS.MS-PS1-1

Look at the image. What how many protons are in oxygen?

• 16

• 7

• 8

• 9

Tags

NGSS.MS-PS1-1

True or false. The proton and atomic number for oxygen is 8?

• true

• false

Tags

NGSS.MS-PS1-1

All the elements of this group is located in the rightmost column of the periodic table. Which elements are they?

• Li, Na, K

• Be, Mg, Ca

• O, S, Se

• He, Ne, Ar

A student finds that an unknown elements readily reacts with alkali metals. What are these elements?

• Li and K

• Mg and Ca

• F and Cl

• He and Ne

Tags

NGSS.MS-PS1-2

Which elements belong to the most reactive nonmetals?

• Li, Na and K

• Be, Mg, and Ca

• F, Cl and Br

• He, Ne, and Ar