Vocabulary
What is an atom?
An atom is a small particle that is the building block of matter.
What are the three subatomic particles that make up an atom?
Protons, Neutrons, and Electrons
What is the atomic symbol of Helium?
He
What is the chemical formula for water?
H2O
What is an element?
An element is a substance that contains only one kind of atom.
What is the charge and location of the protons and neutrons?
Protons- positive (+); nucleus (middle)
Neutrons- neutral (no charge); nucleus (middle)
Write down the atomic symbol and atomic number for tin.
Symbol- Sn
Number- 50
What is the elemental ratio for the following compound:
80% Fluorine, 20% Carbon
4 Fluorine: 1 Carbon
or
4 F: 1 C
What is a molecule?
What is the charge and location of an electron?
Negative (-); Outside the atom (in orbitals)
What is the atomic mass of Rhenium?
186.207
What is the difference between an element and a compound?
What is a compound?
A compound is a substance containing atoms of two or more different elements chemically bonded together.
Why are protons important?
How many protons and electrons are in one atom of Mercury?
80
What is the elemental ratio for the following compound:
50% Oxygen, 25% Carbon, 25% Hydrogen
2 Oxygen: 1 Carbon: 1 Hydrogen
or
2 O: 1 C: 1 H
What is a chemical formula?
A chemical formula is a set of chemical symbols showing the elements present in a compound and their relative proportions, and in some cases the structure of the compound.
Why are electrons important?
They give each atom its unique properties.
How many neutrons are in an atom of Bismuth?
126
What is the chemical formula for the following mystery compound?
25% Nitrogen, 75% Hydrogen
NH3