How many periods in the periodic table?

• 8
• 18

• 12
• 7

How many groups in the periodic table?

• 8
• 18

• 12
• 7

What element in period 4?

• Be

• Zr

• Kr

• none of these

Which element has 3 energy levels?

• Li

• Al

• Sc

• none of these

The number of periods Is equal to the numbers of energy ______

The periodic table is organized by atomic number which is the number of ____________

In the periodic table rows are called ​ (a)   and columns are called ​ (b)   the rows are​ (c)   and the columns are ​ (d)  

• periods
• groups
• horizontal
• vertical

The Elements in a Groups have similar properties the have the ​ (a)   number of electrons in their ​ (b)   orbitals.

Li and Na have ​ one ​ (c)   electron

• same
• outer
• valence
• inner
• different

Tags

NGSS.MS-PS1-1

Which element is in group 6?

• Cr

• Ba

• C

• none of these

Which element has 2 valence electrons?

• H

• Ra

• Cl

• none of these