August
What is a Element?
substances that cannot be broken down into other substances by a chemical method.
Electrons are the same number as protons?
true
what is a Ion?
A charged atom
scientific notation is a number between 1 and what?
10
for sci-not addition and subtraction both exponents must be the BLANK.
Same
What is a compound?
A substance composed of a given combination of elements
what Atomic number is oxygen?
8
how many Atoms are in mono?
1
if the scientific exponent is negative its less then what?
1
when adding or subtracting exponents you have to to pick the lower exponent to move the decimal point to the left?
true
what percent of oxygen is in the human body
65%
how many protrons are in oxygen.
8
what is a covalent bond?
2 atoms sharing VE
4.56*10(4)=?
45600
If the quotient is <1 do you subtract 1 or add 1 to the exponents?
subtract 1
what percent of hydrogen is in the human body
10%
what is radioactive?
Spontaneous breakdown of nucleus
what is a polyatomic ion.
Ion consisting of 2 or more atoms covantley bonded together.
what is a measurment?
A qualititative observation.
when dividing exponents you have to subtract the exponents for the final answer?
true
A element named after california
Californium
What group is Alkali metals?
1A or 1
How many valance electrons are in gallium?
3VE
what is the highest unit on the metric stair case?
Kilos
(6.39*10(-3)hs)-(1.825*10(-4)hs)
6.21*10(-3)