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Parts of an Atom
Periodic Table Trends
Atomic Numbers
Star questions
Bonus
100
The inner part of an atom that contains the proton and the neutron is called the __________.
Nucleus
100

Valence Electrons are represented by what on the periodic table?

Group number 

100
Atomic numbers of an atom are the same as the number of what in an atom?
protons
100

Atom X has an atomic number of 6. What element is this?

Carbon

100

A substance that consists of a single type of atom is _________.

A chemical element

200
These particles have a positive charge and are found inside the nucleus.
proton
200
Atomic masses are measured in what?
AMU
200
Carbon's atomic number is _______.
6
200

The atom contains 11 protons and 1 valence electrons. What am I?

Sodium

200

The center or core of an atom is called ______.

The nucleus 
300
These particles are located within the nucleus, and have no charge.
Neutron
300
A proton has the atomic mass of what?
1
300
What element has a number of 56?
barium
300

Which atom has 5 valence electrons in period number 2 ?

Phosphorus 

300

The number of protons in the nucleus of an atom is known as the ________.

Atomic Number

400
These particles are negatively charge and are found outside the nucleus.
electrons
400
A neutron has the atomic mass of what?
1
400
Why does hydrogen have an atomic number of 1?
because it only has one proton
400

The lewis structure represents what?

Valence electrons

400

The study of the composition, structure, properties and change of matter is known as _______.

Chemistry

500

Most of the mass of an atom is located here.

nucleus

500

An electron has a mass of what?

1/1850

500
Some atoms have more ___________, which makes it an isotope and gives it a negative charge
electrons
500

Density increases in what direction?

Top to bottom and towards the middle

500

This contains a dense central nucleus that is surrounded by a cloud of negatively charged electrons.

Atom