Unit 1

Question 1

What is an Isotope?

Answer 1

Isotopes are elements that have atoms with the same atomic number but different atomic mass numbers.

Question 2

What are Radioisotopes and some examples?

Answer 2

Isotopes that decay to produce nuclear radiation.
- Iodine-131
- Americium-241
- Cobalt-60
- Carbon-14 & potassium-40

Question 3

What is Atomic Radius?

Answer 3

• Atomic radius of an atom is the distance from the nucleus to just beyond the outermost electrons
• In a diatomic molecule, the atomic radius is the distance between the two nuclei, divided by 2

Question 4

What is Effective nuclear charge?

Answer 4

Effective nuclear charge is the net force from electrons in an atom due to the positively charged nucleus.

Question 5

What is Ionization energy?

Answer 5

Ionization energy is the amount of energy required to move an electron when it’s in the gaseous state.

Question 6

What is Electron affinity?

Answer 6

Electron affinity is the energy change that occurs when an electrons is accepted by an atom is the gaseous state

Question 7

What is Electronegativity?

Answer 7

Electronegativity is a scale that describes the ability of an atom to attract electrons when bonded