Periodic Table (U1)

Question 1

What increases from left to right in the periodic table as proton numbers increase?

Answer 1

Metallic character increases

This refers to the tendency of elements to exhibit physical and chemical properties characteristic of metals.

Question 2

What is the state of most elements in the periodic table?

Answer 2

Most elements are solids

Exceptions include hydrogen (H), oxygen (O), nitrogen (N), group 7 gases, and the liquids mercury (Hg) and bromine (Br).

Question 3

How many groups are in the periodic table?

Answer 3

8 groups

Each group has specific characteristics based on the number of outer electrons.

Question 4

What does the group number represent in the periodic table?

Answer 4

Number of outer electrons

This is crucial for understanding an element’s reactivity and bonding behavior.

Question 5

What are the elements in Group 1 called?

Answer 5

Alkali metals

These metals are highly reactive and include lithium, sodium, and potassium.

Question 6

What are the elements in Group 7 known as?

Answer 6

Halogens

Halogens are reactive nonmetals, including fluorine, chlorine, bromine, iodine, and astatine.

Question 7

What is the name of Group 0 elements?

Answer 7

Noble gases

These gases are characterized by having a full outer shell of electrons, making them largely unreactive.

Question 8

What does the period number represent in the periodic table?

Answer 8

Number of shells

This indicates the energy levels of electrons in an atom.