Measurements
Convert 36 in to ft
3 ft
How many Sig Figs
1.2345
5 sig figs
What is the negatively charged particle in an atom
The electron
State of matter that flows and takes the shape of the container
liquid
Atomic Number
The number of protons in the nucleus of an atom
How many meters in a Kilometer?
How many sig figs?
0.0100300
6 sig figs
What is the Neutral charged particle in an atom?
The Neutron
The amount of matter in an object
Mass
Cation
A positively charged atom with more protons than neutrons
How many Centimeters in a meter?
100 Centimeters
Round to 4 sig figs
1.297736
1.298
Where are the protons and neutrons found in an atom?
the nucleus
Consists of two or more atoms joined by strong forces called chemical bonds
molecule
Density
The ratio of the mass of a sample of a substance to its volume
Convert 2 Km to mm
2,000,000 mm
Round to 3 sig figs
45.25
45.2
What weighs more, the electron or the neutron?
Neutron
State of matter that takes the shape and volume of its container
gas
Unit
Standards of comparison for measurements (Liters, pounds, miles)
How many ft in a mile?
5280ft (five tomatoes)
Find the density of the lead block
mass of block = 170.1 g
Volume = 15 mL
11.34 g/mL
What takes up the most space in an atom
The electrons in the electron cloud
The change of one type of matter into another
chemical change
Physical Change
A change in the state or properties of matter without any change in the chemical identities of that matter.