APE: Atomic Number, Protons, and Electrons

Atomic Number, Protons, and Electrons

Elements in the Periodic Table

Elements can be found in the Periodic Table. Some common elements are: Hydrogen, Carbon, Oxygen, and NItrogen.

Look at the element Argon. The atomic number of Argon 18.

Multiple Choice

What is the Atomic number of Argon?

• 18

• 39

APE

• The acronym "APE" can be used to tell us how many protons and electrons an element has.

• Argon has an atomic number of 18.

• APE stands for: Atomic Number = protons = electrons

• Since Argon's ATOMIC NUMBER = 18, then it has 18 PROTONS and 18 ELECTRONS.

Multiple Choice

Calcium has an atomic number of 20. How many protons and electrons does it have?

• 20

• Yo no say

Multiple Choice

Carbon has an atomic number of 6. How many protons and electrons does it have?

• 25

• 6

Multiple Choice

Copper has an atomic number of 29. How many protons and electrons does it have?

• 45

• 29