SJB: Atomic structure

What is the charge of a proton?

• Positive

  +1

• Negative

  -1

• Neutral

  0

• Negligible

  1/2000

What is the charge of an electron?

• Positive

  +1

• Negative

  -1

• Neutral

  0

• Negligible

  1/2000

What is the charge of a neutron?

• Positive

  +1

• Negative

  -1

• Neutral

  0

• Negligible

  1/2000

What is the mass of a proton?

• 1

• 0

• 1/2000

• -1

What is the mass of a neutron?

• 1

• 0

• 1/2000

• -1

What is the mass of a electron?

• 1

• 0

• 1/2000

• -1

Atoms have no overall ………………….. because the positive protons cancel out the negative electrons.

(a)  

Which of the following is not true about lithium?

• Each Lithium atom has 3 protons

• Each Lithium atom has 3 electrons

• The average mass of lithium is 7

• Lithium has an atomic number of 7

Which of the following is not true about chlorine?

• Each Chlorine atom has 17 protons

• Each Chlorine atom has 17 electrons

• The average mass of chlorine tells us it has no isotopes

• The average mass of chlorine tells us it has no isotopes

Sodium has 11 protons in its nucleus. Which of the following is true about sodium?

• It’s electron configuration is 2.8.8.2

• It’s a non-metal

• It is found in group 1

• It is found in period 4