Electrons
General Terms
Periodic Table
Charge
Elements
100

How many electrons are in a neutral hydrogen atom?

1

100

Unit of measurement for atomic mass

AMU/u

100

Name three ways the periodic table is organized

Groups, periods, atomic number, etc.

100

Charge of an atom with...

1 electron and 1 proton

Neutral

100

What element has atomic number 5

Boron

200

What is an electron?

A subatomic particle with a negative charge

200

What is a valence electron?

An electron on the outermost shell of an atom

200

What is the periodic table of elements?

A chart of chemical elements arranged in an orderly fashion displaying some chemical properties along with information of/on each element.

200

Charge of an atom with...

25 protons

3 neutrons

24 electrons

1+

200

What element has the chemical symbol Ca

Calcium

300

How many electrons can fit in the first and second shells

10

300

Name three things commonly shown in an element's box on the periodic table

Chemical Symbol, Average Atomic Mass, Name, Atomic Number

300

What is a group and what does it show?

Columns, valence electrons

300

What is an atom called with a non-neutral charge?

Ion

300

What element has chemical symbol Ar

Argon

400

How many electrons in a nitrogen ion with a charge of 1+?

6

400

What is the middle of an atom with the protons and neutrons called?

The Nucleus
400

What group on the periodic table contains Noble Gases?

18

400

How many electrons does a helium atom with a -2 charge have?

4

400

How many elements are on the periodic table?

118

500

What is the term for a positive ion?

cation

500

What is the most dense part of an atom?

The Nucleus
500

What group on the periodic table contains Halogens?

17

500

What unit is charge measured in?

Coulombs

500

What is the name for the theoretical 119th element on the periodic table?

Ununennium