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)
How many periods are shown on the periodic table?
7
What is the atomic number of argon (Ar)?
18
A chemical bond between two nonmetals is called a
covalent bond.
A positive ion is known as a?
Cation
What type of elements are the most abundant on the periodic table?
Metal
What are the elements in Group 18 called ?
Noble Gases
How many grups are on the periodic table?
18
Name the scientist who first include the nucleus in its atomic model
Rutherford
What are the elements in Group 1 called ?
Alkali Metals
Name all 3 subatomic particles.
Protons Neutrons Electrons
How are ions formed?
By losing or gaining electrons
10^-9
nano
10^3
kilo
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
The substances mixed to produce a chemical reaction are called
Reactants
Which is the correct formula for the compound formed between lithium and sulfur?
Li2S
name this compound CrO4^2-
chromate
Elements with the same number of protons but different number of neutrons
Isotope
Give the formula for Hydrogen Sulfate
HSO4-
A covalent bond is a sharing of
Electrons
Which is the correct formula for the compound chromium (III) oxide?
Cr2O3
Name the compound CCl4?
carbon tetrachloride
What is the formula for cobalt (II) iodine?
CoI2
Lithium, sodium, potassium, rubidium, caesium and francium belong to the family of ______________
Alkali metal
name this compound C2H3O2
Acetate
Given the number of protons, neutrons, and electrons, what would be the mass number and the charge number of each isotope? What would be the atomic number? The identity of the element?
g) 7 protons, 7 neutrons, 10 electrons
Mass number is 14, charge is –3. Atomic number is 7, identity is nitrogen (N).
How many molecules of H2O are in 0.0643 grams of H2O?
0.0643 grams of H2O is equal to 0.00357 moles, which is 2.15 x 10^21 molecules
How many moles of Ca3(PO4)2 are in 57.82 grams?
0.1864 moles
A type of elements with properties between metals and non metals
Semimetals