Chemistry 1
What number do you use to find the number of protons?
atomic number
What are the 3 main states of matter?
Solid, liquid, gas
What is the 25th element called?
Manganese or Mn
C-14 has how many neutrons?
8
What is the formula for density?
Density = Mass/Volume (Mass over volume)
What is the formula for atomic mass?
Protons plus Neutrons
What is the atomic number of argon (Ar)?
18
How many total electrons does the F- ion have?
10 electrons
A positive ion is known as a?
Cation
What is the formula for average atomic mass?
(Abundance x Mass Weight) + (Abundance x Mass Weight)
Who discovered the planetary model?
Rutherford
Which subatomic particle weighs the smallest amount?
Electrons
What particles are in the nucleus of the atom?
protons and neutrons
Elements with the same number of protons but different number of neutrons
Isotope
Name the scientist who first include the electrons in its atomic model
Thomson
Who many neutrons does He-5 have?
What is the elemental symbol for Potassium?
Name the scientist who first include the nucleus in its atomic model
Rutherford
Which particle has no charge?
Neutrons
Name all 3 subatomic particles.
Protons Neutrons Electrons
How are ions formed?
By losing or gaining electrons
A negatively charged ion
Anion
What is the unit of measurement for mass?
grams
The Chloride ion (Cl-) has _____e-
18 e-
The sum of protons and neutrons in the nucleus of an atom is known as the _________
Mass number
Electrons
What is the relationship between protons and electrons in neutral atoms?
They are equal.
If Aluminum has an Atomic Number of 13 and an Atomic Mass of 27, how many protons does it have?
13
What is the unit of measurement for volume?
Liter
Relation between the amount of solute and solvent in a solution.
Concentration