Periodic Table (Trends, Periods, Groups)

Question 1

What is the periodic table?

Answer 1

A chart of the elements arranged by atomic number, where elements with similar properties are grouped together.

Question 2

What are periods on the periodic table?

Answer 2

Horizontal rows of elements.

Question 3

What are groups on the periodic table?

Answer 3

Vertical columns of elements.

Question 4

What is a trend in the periodic table?

Answer 4

A predictable pattern or variation in properties of elements across a period or down a group.

Question 5

What is atomic radius?

Answer 5

The distance from the nucleus of an atom to the outermost electron shell.

Question 6

How does atomic radius change across a period and down a group?

Answer 6

Across a period: decreases; down a group: increases.

Question 7

What is ionization energy?

Answer 7

The energy required to remove an electron from an atom.

Question 8

How does ionization energy change across a period and down a group?

Answer 8

Across a period: increases; down a group: decreases.

Question 9

What is electronegativity?

Answer 9

The tendency of an atom to attract electrons in a chemical bond.

Question 10

How does electronegativity change across a period and down a group?

Answer 10

Across a period: increases; down a group: decreases.