Fluorine is an element comprised of 9 electrons.

Draw the electron arrangement on the picture!

Lithium has 3 protons.

Draw the electron arrangement on the picture!

Draw the electron arrangement on the picture if it is known that the atomic number of Neon is 10

The picture shows the electron arrangement or Argon (Ar).

Which of the following statements are correct about the following Argon?

• Argon has 18 electrons in the outer shell

• The electron configuration of Argon is 2,8,8,7

• Argon is in period 3 in the periodic table

• The atomic number of Argon is 18

The atomic symbol is completed with a number representing the amount of electrons.

What is the atomic number of Beryllium (Be)?

• 1

• 4

• 7

• 5

The atomic symbol is completed with a number representing the amount of electrons.

What is the atomic number of Nitrogen (N)?

• 1

• 4

• 7

• 5

Which element is located in period 3 and group IIA?

• Mg

• Be

• Ca

• B

The picture shows the electron arrangement of Chlorine (Cl). Read the following statement, is it True or False?

"Chlorine has 1 electron in the outer shell"

• True

• False

The picture shows the electron arrangement of Chlorine (Cl). Read the following statement, is it True or False?

"The atomic number of Chlorine is 27"

• True

• False

The picture shows the electron arrangement of Chlorine (Cl). Read the following statement, is it True or False?

"Chlorine is located at group VIIA and period 3"

• True

• False