A
What is the basic unit of matter?
Atom
Which atomic particle with a negative charge occupies the energy shells around the nucleus?
electrons
When atoms share electrons, they form a ___________ bond.
covalent
What is the chemical formula for oxygen in the air?
O2
What is the chemical formula for copper?
Cu
What two atomic particles are charged?
proton and electron
How can we remove water from a salt and water solution?
Boiling or evaporating
Do metals have a high or low conductivity of heat and electricity?
High conductivity -
MgSO4 contains how many Sulfurs?
1
True of False: Noble gases are very reactive because they have a full valence shell.
False - non-reactive ( inert)
The atomic number on the Periodic Table is the number of ________________ of an atom.
protons
If I want to add water to make a solution, what can I use to measure a specific volume of water?
graduated cylinder
What are the two measurements we need to calculate density?
mass and volume
What molecule makes up most of the air around us?
nitrogen ( N2)
An element in family 6A, would most likely give up 2 electrons, accept 2 electrons, or give away 6 electrons?
accept 2 electrons to get to the Octet Rule of 8 valence electrons.
Describe some properties of a Non-Newtonian liquid.
It behaves as both a solid and liquid. If you apply intense pressure it resists like a solid. When you apply low pressure it behaves as a liquid. It also flows.
What are the 4 letters that represent the different electron shells?
s,p,d, and f
Name two families that contain metals.
Alkali metals and Alkaline Earth metals
When you want to measure mass, what instrument do you use?
scale
What is the element in Period 3 and family 7A?
Chlorine ( Cl)
In the Periodic Table, elements in a row are in the same ________________ and elements in the same column are in the same _______________.
Period
Family
Metals and non-metals tend to form ___________ bonds.
ionic
Why are atomic masses in the Periodic Table rarely whole numbers. They often are 12.999 decimals.
The atomic mass is an average of the % abundance x the atomic weight.
30% of an element has a mass of 11
70% of an element has a mass of 12
atomic mass = 11.7
In a Lewis dot structure, what is the maximum number of dots drawn around an element?
8
Why do the balls ( atoms ) in a Molecular Model kit have different number of holes in them?
The holes represent the number of bonds or electrons the particular atom needs.