How many electrons are in a neutral hydrogen atom?
1
Unit of measurement for atomic mass
AMU/u
Name three ways the periodic table is organized
Groups, periods, atomic number, etc.
Charge of an atom with...
1 electron and 1 proton
Neutral
What element has atomic number 5
Boron
What is an electron?
A subatomic particle with a negative charge
What is a valence electron?
An electron on the outermost shell of an atom
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.
Charge of an atom with...
25 protons
3 neutrons
24 electrons
1+
What element has the chemical symbol Ca
Calcium
How many electrons can fit in the first and second shells
10
Name three things commonly shown in an element's box on the periodic table
Chemical Symbol, Average Atomic Mass, Name, Atomic Number
What is a group and what does it show?
Columns, valence electrons
What is an atom called with a non-neutral charge?
Ion
What element has chemical symbol Ar
Argon
How many electrons in a nitrogen ion with a charge of 1+?
6
What is the middle of an atom with the protons and neutrons called?
What group on the periodic table contains Noble Gases?
18
How many electrons does a helium atom with a -2 charge have?
4
How many elements are on the periodic table?
118
What is the term for a positive ion?
cation
What is the most dense part of an atom?
What group on the periodic table contains Halogens?
17
What unit is charge measured in?
Coulombs
What is the name for the theoretical 119th element on the periodic table?
Ununennium