Pure Substances Flashcards
How do we give different atoms names?
Based on the number of protons they have in their nuclei.
True or False. Elements are not limited in number and are not the building blocks of millions of compounds.
False
What do you call diatomic molecules?
Molecules of elements
What do you call it when atoms react together chemically?
Molecules of compounds
What is each elements on the periodic table represented by?
Symbol
What are elements named after?
Latin/English words or named after a person.
True or False, elements are arranged left to right and top to bottom in order of increasing atomic number and as the atomic number increases, so does the atomic mass.
True
H
Hydrogen
He
Helium
Li
Lithium
Be
Beryllium
B
Boron
C
Carbon
N
Nitrogen
O
Oxygen
F
Fluorine
He
Neon
Na
Sodium
Mg
Magnesium
Al
Aluminium
Si
Silicon
P
Phosphorus
S
Sulfur
Cl
Chlorine
Ar
Argon
K
Potassium
Ca
Calcium
Cr
Chromium
Mn
Manganese
Fe
Iron
Co
Cobalt
Ni
Nickel
Cu
Copper
Zn
Zinc
Br
Bromine
Ag
Silver
Sn
Tin
I
Iodine
Ba
Barium
Pt
Platinum
Au
Gold
Hg
Mercury
Pb
Lead
U
Uranium
What is a compound?
A substance that consists of atoms of 2+ different elements chemically bonded together.
Table salt
Chemical name: sodium chloride
Chemical symbol: NaCl
Elements present: Na+Cl
Epson Salts
Chemical name: Magnesium sulphate
Chemical symbol: MgSo4
Elements present: Mg+S+O
Caustic Soda
Sodium Hydroxide
Caustic Soda
Chemical name: Sodium Hydroxide
Chemical symbol: NaOH
Chemicals present: Na+O+H
Blue stone
Chemical name: copper(2) sulphate
Chemical symbol: CuSO4
Elements present: Cu+S+O
Carbon dioxide
Chemical name: carbon dioxide
Chemical symbol: CO2
Elements present: C+O
Water
Chemical name: dihydrogen oxide
Chemical symbol: H2O
Elements present: H+O
What forms when 2+ atoms are chemically bonded together? This can be the same or different atoms.
Molecule
What is a molecule?
Smallest particle of a substance that can exist on its own and have all the characteristics of that substance.
What are the 7 diatomic molecules?
H2 N2 O2 F2 Cl2 Br2 I2
What is formed when 2+ different atoms combine?
Compound
What can a chemical bond be defined as?
A FORCE THAT HOLDS ATOMS TOGETHER
Compounds such as H20, CO, NaCl are founded by chemical reactions between the elements from which they are made
Synthesis reaction