Atoms
The number of protons in the nucleus of an atom; also determines the element
atomic number
The coefficient of scientific notation is between these numbers
1 and 10 (more than 1, less than 10)
A measurement includes all of the digits that are known, plus a last digit that is estimated
Significant figures (sig figs)
Base unit of length measurements
Meter
A measure of how close a measurement comes to the actual or true value of whatever is measured
Accuracy
Atoms that have the same number of protons but varying masses due to the differing number of neutrons
isotopes
A negative exponent in scientific notation indicates
a number smaller than 1 (a decimal)
Nonzero digits are _______ significant
always
Base unit of volume measurements
Formula for density
mass/volume
The 3 subatomic particles and their charge
proton (positive), neutron (neutral), electron (negative)
23497 in scientific notation
2.3497 x 104
Leading zeros are ______ significant
never
A revised version of the metric system that was adopted by international agreement in 1960
International System of Units (SI Units)
The conversion from Celsius to Kelvin
Add 273.15
iron
6.3 x 10-3 in standard form
0.0063
The number of significant figures in 28309
5 sig figs
20 kilograms in milligrams
20,000,000 milligrams
The arrangement of elements in which the elements are separated into groups based on a set of repeating properties
The Periodic Table of Elements
The mass number of bromine with 45 neutrons.
80
The solution of (3 x 104) x (2 x 102) in scientific notation
6 x 106
7 sig figs
45 dm in dam
0.45 dam
This man did an experiment that involved a sheet of gold, alpha particles, and a fluorescent screen and discovered the atom's nucleus
Ernest Rutherford