Counting Atoms and Periodic Table

Beryllium has how many protons?

• 4

• 9.0122

• 2

• 13.0122

Tags

NGSS.MS-PS1-1

What element is this model showing?

• Lithium

• Boron

• Carbon

• Neon

Tags

NGSS.MS-PS1-1

What does an atom's period tell us?

• Number of protons

• Number of electrons

• Number of valence electrons

• Number of shells

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 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

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

Match the correct parts of the periods table

• Yellow (Right)

• Nonmetals

• Rows 1-7

• Metalloids

• Red (middle)

• Periods

• Blue (left)

• Metals

• Columns 1-18

• Groups

What is the NAME of the element in period 3, group 13?

• Aluminum

• 13

• Gallium

• Al

Answer explanation

The element in period 3, group 13 is Aluminum, which has the atomic number 13. Therefore, the correct answer is 13, as it refers to the atomic number of Aluminum.

Tags

NGSS.MS-PS1-1

What does an atom's group tell us?

• Number of protons

• Number of electrons

• Number of valence electrons

• Number of shells