Sig Figs
How many sig figs in 0.0520?
3
Write 6,500,000 in scientific notation
6.5 x 10^6
Name the three subatomic particles and their relative charge
Protons (+), neutrons (0), and electrons (-)
Convert 2.5 L to mL
2500 mL
True or False: Sandwiched zeros (ex: 205) are always significant
True
How many sig figs are in 45.360 g?
5
Write 0.00082 in scientific notation
8.2 x 10^-4
Name at least 3 elements that exist as diatomic elements
H, O, N, F, Cl, Br, I
How many cm in 1 meter?
100 cm
Which is more precise: 3.0 g or 3.00 g?
3.00 g
0.0456 + 0.000678 = ?
0.0463
Expand 4.56 x 10^-3 into standard notation
0.00456
Atoms of the same element with different numbers of neutrons are called?
Isotopes
A cheeseburger has 50 mg sodium. Express in grams
0.050 g
Which metric prefix means 1/1000?
milli- (m)
4.56 x 1.4 = ?
Which is larger: 3.2 x 10^5 or 8.1 x 10^4
3.2 x 10^6
How do you form cations and/or anions?
When electrons are added to a neutral atom, an anion is formed.
Convert 2.0 L into teaspoons
400 tsp
Which element is signified as Pb?
Lead
0.00567 x 4.890 = ?
0.0277
DAILY DOUBLE!!!!
Multiply in scientific notation: (3.0 x 10^3)(2.0 x 10^-5). Give correct sig figs
6.0 x 10^-2
Name the three general categories of elements on the periodic table
Metals, nonmetals, metalloids
A block has mass 15.3 g and volume 2.5m. What is the density? (don't forget about sig figs)
6.1 g/mL
DAILY DOUBLE!!!!
The wavelength of light is 0.000000532 m. Express this in nanometers (nm). Write the answer in scientific notation with the correct sig figs.
5.32 x 10^2 nm