Lab Quiz #1 Flashcards
1
Q
How to calculate density
A
Mass / Volume
2
Q
Steps to balancing an equation
A
- Identify # and type on each side
- Add coefficients yo balance atoms
- Do not change subscripts
3
Q
scientific notation multiplication
A
multiply coefficients and add the exponents
4
Q
scientific notation division
A
divide exponents and subtract exponents
5
Q
significant digits
A
nonzeros
zeros between nonzeros
zeros after decimal point
6
Q
not significant digits
A
zeros to the left of all nonzeros
7
Q
may be significant
A
zeros to the right of nonzeros
8
Q
ionic compounds
A
- oppositely-charged ions
- don’t form molecules
- formula unit or empirical formula
- ionic lattice
9
Q
covalent compounds
A
- share electrons
- between nonmetal atoms
- usually form molecules
- molecular formula
10
Q
how to calculate formula mass for a compound
A
add the atomic masses of each atom in the formula unit
11
Q
group 1A (column 1)
A
alkali metals
12
Q
group 2A (column 2)
A
alkaline earth metals
13
Q
group 7A (column 17)
A
halogens
14
Q
group 8A (column 18)
A
noble gases
15
Q
transition metals
A
columns 3-12
