Chemistry Test #2

Periods on the periodic table indicate the number of

energy levels

The nucleus of the atom has what charge?

positive

The symbol for Iron

Fe

An atom has 17 protons and 18 neutrons, what is its mass number?

35

How many periods are there in the periodic table?

7

Which element has the atomic number of 8?

oxygen

Which of the following is an Alkaline Earth Metal

Calcium

This element has an atomic number of 13

Aluminum

Name an element on the periodic table in period 5, group 11

Silver

What is the mass number - atomic number?

The number of neutrons

What is the atomic number?

Number of protons

Which subatomic particle has a positive charge?

proton

Halogen Family

group 17

An example of an element in the Halogen family

Chlorine

True or False - Groups on the periodic table are arranged vertically

True

Which group of elements on the periodic table are all gases at room temperature?

Noble gases

How many valence electrons does Magnesium have?

2

The electrons on the outermost energy level are called

valence electrons

How do you find the number of neutrons?

Mass number - Atomic number

Two examples of metalloids

Si and Ge

Elements that have chemical and physical properties of both metals and nonmetals are

metalloids

Barium (Ba) is in what period?

6

The atomic number for Sodium (Na) is..

11