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Parts of an Atom
Atomic Masses
What is Matter?
Atomic Numbers
Calculations
100
The inner part of an atom that contains the proton and the neutron is called the __________.
Nucleus
100

Atomic mass of oxygen

15.999

100

This is anything that takes up space & has mass.

matter

100
Atomic numbers of an atom are the same as the number of what in an atom?
protons
100

Avogadro's number

6.022 * 1023

200
These particles have a positive charge and are found inside the nucleus.
proton
200

Atomic masses are measured in what?

AMU or g/mol

200
The smallest pieces of matter are called __________.
atoms
200
Carbon's atomic number is _______.
6
200

Density of lead if the volume is 20.0cm^3 & mass is 228g. D= mass / volume

11.5g/cm^3

300
These particles are located within the nucleus, and have no charge.
Neutron
300
A proton has the atomic mass of what?
1
300
What element has a number of 56?
barium
300

Number of atoms in 2 moles of Calcium

1.204*1024

400
These particles are negatively charge and are found outside the nucleus.
electrons
400
A neutron has the atomic mass of what?
1
400
Why does hydrogen have an atomic number of 1?
because it only has one proton
400

Number of moles in 3*1023 atoms of Magnesium

0.5

500
Most of the mass of an atom is located here.
nucleus
500
An electron has a mass of what?
1/1836
500

A space that does not have any matter

Vacuum

500

Some atoms have more ___________, which makes it an isotope and gives it more mass.

neutrons

500

Number of atoms in 15g grams of H2O.

5.0*1023