Basic Nomenclature
Name the ionic compound MgBr2
Magnesium bromide
What are isotopes?
Same atomic number, different mass number.
i.e, same number of protons, different number of neutrons.
Define matter.
Anything that has mass and takes up space.
What state of matter has definite shape and volume? Explain
Solid; The arrangement of molecules are tightly packed, high IMF
Convert 25°C to K.
Name the compound ZnS
Zinc Sulphide
Father of Chemistry?
Antoine Lavoiser
What is a compound?
A substance made of two or more elements chemically combined.
What process changes a liquid directly to a gas?
Evaporation/ Boiling
Define accuracy.
How close the measurements are to true value.
Name the coumpund CO
carbon monoxide
What's a hypothesis? Give me an example
Testable prediction
I will grow taller if I stretch every day.
What is a mixture?
A physical combo of substances.
Prefix for a Covalent Compound that translates to 6
Hexa
Average atomic mass formula
(% abundance x mass no)/100
Name the compound N2O4
What's a theory? Give me an example
Broad, tested explanation of phenomena.
Earth's gravitational pull is 9.8m/s^2.
Name two types of mixtures.
Homogeneous & Heterogeneous
What happens to a molecule when a solid melts?
They gain energy, move faster, and spread out.
Define precision.
How close repeated measurements to each other.
Covalent- non metal + non metal
Ionic- Metal + non metal
Diatomic vs Polyatomic molecules. Give an example for each
Molecules with 2 atoms joined together- Diatomic
ex) O2
Molecules with more than 2 atoms attached- Polyatomic
H20
Give an example of a pure element & a pure compound.
O₂ & H₂O
For an ionic compound, what does the non-metal (family name) usually end in?
-ide
If I lose an electron, what kind of charged ion will I have?
+1