Atomic Structure and Periodic Table Worksheet

A neutral atom may contain 8 protons,

• 9 neutrons and 10 electrons.

• 9 neutrons and 8 electrons.

• 8 neutrons and 10 electrons.

• 10 neutrons and 9 electrons.

The nucleus of an atom has all of the following characteristics EXCEPT that it

• is positively charged.

• contains nearly all of the atom’s mass.

• is very dense.

• contains nearly all of the atom’s volume.

How many valence electrons does an atom of magnesium typically have?

• 2

• 3

• 12

• 24

The number of energy levels an atom will have is based on the number of __________ it has.

• protons

• neutrons

• electrons

• quarks

Which of the following would NOT be found in the nucleus of an atom?

• protons

• neutrons

• electrons

• quarks

Which of the following elements would be the most reactive?

• Chlorine

• Silicon

• Nickel

• Krypton

Which of the following elements would be the least reactive?

• Bromine

• Silicon

• Nickel

• Krypton

The nucleus of isotope A of an element has a larger mass than isotope B of the same element. The number of neutrons in the nucleus of isotope A is __________ the number of neutrons in the nucleus of isotope B.

• less than

• greater than

• the same as

• equal to the number of protons in isotope B

Which element is most likely to form a negative ion?

• Sodium

• Magnesium

• Chlorine

• Aluminum

What is the atomic number of an element with 11 protons?

• 10

• 11

• 12

• 13