Atomic Structure

Question 1

In the current understanding of atomic theory (true or false):

Gluons hold the positively charged particles of the nucleus together

Answer 1

True

Question 2

In the current understanding of atomic theory (true or false):

Neutrons are made up of quarks

Answer 2

True

Question 3

In the current understanding of atomic theory (true or false):

Photons are relatively heavy, positively charged particles

Answer 3

False. Photons have no mass and carry no charge. They mediate the electromagnetic force between other electrically charged subatomic particles.

Question 4

In the current understanding of atomic theory (true or false):

Electrons display behaviours characteristic of both particles and waves

Answer 4

True

Question 5

In the current understanding of atomic theory (true or false):

When an electron drops to a lower energy orbital, a photon is emitted

Answer 5

True

Question 6

In the current understanding of atomic theory (true or false):

The number of electrons orbiting the nucleus determines an element’s atomic number

Answer 6

False. The atomic number is equal to the number of protons in the nucleus.

Question 7

In the current understanding of atomic theory (true or false):

Elements with atomic numbers 3,4,5 and 6 are in the same row of the periodic table

Answer 7

True

Question 8

In the current understanding of atomic theory (true or false):

The arrangement of electrons in the outer orbitals determines how an atom will react with another atom

Answer 8

True

Question 9

In the current understanding of atomic theory (true or false):

The first element in the modern periodic table is helium

Answer 9

False. Hydrogen (atomic number 1) is the first element in the periodic table.

Question 10

In the current understanding of atomic theory (true or false):

The atomic weight of an isotope is equal to the number of protons plus the number of neutrons in its nucleus

Answer 10

True