Atoms & Atomic Structure
What are the 3 subatomic parts of an atom?
Protons, Neutrons & Electrons
Where are all elements found?
The Periodic Table
How are elements in a mixture combined?
Physically
How many groups and periods are there on the periodic table?
7 Periods - 18 Groups
What are the 3 states of matter?
Solid, Liquid & Gas
What charge does each subatomic particle have?
Protons = +
Neutrons = Neutral
Electrons = -
What makes one element different from another element?
They each have their own number of protons, neutrons & electrons
What is the difference between a homogenous and heterogenous mixture?
Homogenous looks the same and uniform throughout
Heterogeneous looks different and you can see the different parts
Luster, Malleability, Ductility & Conductivity are words to describe...
Metals
Which state of matter has particles vibrating closely together?
Solid
What two subatomic particles are inside the nucleus of an atom?
Protons & Neutrons
How are elements in a compound combined?
Chemically
Which type of mixture is a salad?
Heterogenous
If Lithium is in Group 1 and has 1 valence electrons, which group of elements will Lithium most likely react with?
Group 17 - Halogens
What happens to the particles in a substance as it changes from a liquid to a gas?
They gain energy and speed up and move further apart
How do we determine the number of protons and electrons an atom has?
Atomic Number = Protons = Electrons
Which substances are compounds?
1. H2
2. H2O
3. Cl2
4. NaCl
2 and 4
How can mixtures be separated? (4 ways)
Magnetic Attraction, Sifting, Filtration & Evaporation
Which side of the periodic table are nonmetals found?
Right side
Is there a state of matter in which the particles are not moving at all?
No they are constantly moving whether they are in a solid, liquid or gas
How do we determine the number of neutrons an atom has?
Mass - Atomic Number = Neutrons
True or False: Elements are considered pure substances
True
What 2 separation methods could you use to separate a mixture of water, sand and rocks?
Evaporation & Sifting
True or False: Sodium (Na) and Magnesium (Mg) are similar because they are found in the same group
False - they are in the same period.
When you apply heat energy to a substance, where does the energy go?
The atoms absorb the energy and begin to move faster