Periodic Trends

Question 1

Atomic mass

Answer 1

Some of protons+neutrons

Question 2

Atomic radius

Answer 2

The distance from the center of the atom to the outermost electrons. Atomic radius indicates the size of the atom

Question 3

Ionization energy

Answer 3

The minimum amount of energy needed to remove the outermost electron from an isolated atom of a gaseous sample of an element

Question 4

Electron affinity

Answer 4

The amount of energy released when an electron is added to an atom

Question 5

Electronegativity

Answer 5

Tendency of an atom to attract electrons

Question 6

What group of elements has the lowest electron affinity? Why?

Answer 6

Metals. Because metals lose electrons to become balanced rather than gain

Question 7

What is the difference between the 1st ionization energy of an element and the 3rd

Answer 7

In the 3rd ionization energy; atoms are getting larger and electrons are further away from the nucleus. Also the outer electron becomes increasingly more shielded from the nucleus by inner electrons

Question 8

What happens when you add an electron to potassium

Answer 8

Potassium is a metal and a cation, meaning protons outnumber electrons and there’s less shielding of electrons

Question 9

What happens when you remove an electron from chlorine

Answer 9

Chlorine is a nonmetal and an anion, meaning electrons outnumber protons and there’s greater electron to electron repulsion