Atomic structure and the periodic table

Atomic Structure

100

All ____________ are made up of two or more atoms bonded together.

molecules

200

A tiny but very dense, positively charged portion of the atom that holds most of the atomic mass

Nucleus

300

What is one way Neutrons are different from electrons?

neutrons have no charge, while electrons have a negative charge

400

Value representing the number of protons in an element

Atomic Number

500

A substance that cannot be broken down into other substances by chemical or physical means.

Element

Atomic Structure and Ions

100

An atom becomes _________ when it gains electrons.

Negative

200

How many neutrons does B (Boron) contain?

6

300

The negatively charged subatomic particles that are located in energy levels around the nucleus

Electrons

400

Loss or gaining of an electron changes and atom into __________.

ions

500

Think fast! An element has 25 protons and 22 electrons. It has a charge of...

3+

periodic table

100

What is the atomic mass of an atom of rubidium, and how many neutrons does each rubidium atom have?

Rubidium has 49 neutrons, and the atomic mass is 85.5

200

What is the atomic number of fluorine (F)?

9

300

Which element from period 4 has the highest atomic mass, and which element from group 17 has the lowest atomic number?

Highest atomic mass-Kr (Krypton)

400

How many neutrons does each boron atom contain, and what is Boron’s atomic number?

Boron has 6 neutrons, and the atomic number is 5.

500

How many total protons does each nickel atom contain, and what is the atomic mass of Cobalt?

Nickel has 28 protons, and the atomic mass of Cobalt is 58.9.