Atoms and Periodic Table

What represents electrons in a marble run?

• The person pushing the marbles

• The marbles

• The tubes

The atomic number tells you what?

• number of electrons

• number of protons

• number of neutrons

• both electrons and protons in an atom.

What does the 1.00794 stand for?

• Hydrogen

• atomic number

• atomic mass

• atomic explosion

Tags

NGSS.MS-PS1-1

How many protons are in Beryllium?

• 4

• 9

• 5

• 2

Tags

NGSS.MS-PS1-1

What do we call the horizontal rows on the periodic table?

• Periods

• Groups

Answer explanation

The horizontal rows on the periodic table are called periods. Each period represents a different energy level of electrons in the atoms of the elements in that row.

Match the correct parts of the periods table

• Columns 1-18

• Metals

• Rows 1-7

• Periods

• Blue (left)

• Nonmetals

• Yellow (Right)

• Metalloids

• Red (middle)

• Groups

What do we call the horizontal rows on the periodic table?

• Periods

• Groups

Answer explanation

The horizontal rows on the periodic table are called periods. Each period represents a different energy level of electrons in the atoms of the elements in that row.

What do we call the vertical columns on the periodic table?

• Periods

• Groups

Label the parts of the periodic table​

a

b

c

Metals

Metalloids

Nonmetals

Tags

NGSS.MS-PS1-1

What do we call the vertical columns on the periodic table?

• Periods

• Groups

Answer explanation

The horizontal rows on the periodic table are called periods. Each period represents a different energy level of electrons in the atoms of the elements in that row.