1.2 Atomic Structure And Periodic Table

What is a row in the periodic table called?

A period

Which group of elements are found on the left-hand side of the periodic table?

Metals

How are elements in the periodic table arranged?

In order of increasing atomic number

What is a column of elements in the periodic table called?

A group

What do groups in the periodic table contain?

Elements with the same number of outer electrons

What are the group 1 elements known as?

Alkali metals

What are the group 7 elements known as?

Halogens

What are the group 0 elements known as?

Noble gases

Where are transition metals located in the periodic table?

In the middle block

What is the charge and mass of a proton?

Positive charge of one and a relative mass of one

What is the charge and mass of a neutron?

Neutral charge and a relative mass of one

What is the charge and mass of an electron?

Negative charge of one and no mass

Why do atoms have no overall electric charge?

Because the number of negative electrons equals the number of positive protons

What does the atomic number of an atom represent?

The number of protons

How is the mass number of an atom calculated?

By adding the number of protons and neutrons

How can you calculate the number of neutrons in an atom?

By subtracting the atomic number from the mass number

What are isotopes defined as?

Atoms with the same atomic number but different mass numbers

What is relative atomic mass?

The average atomic mass calculated using the mass and proportion of each isotope present

How many electrons can the first energy level hold?

Two electrons

How many electrons can the second energy level hold?

Eight electrons