Location
Charge and Mass
Mass and Atomic Number
Isotopes
Average Atomic Mass
Avogadro's Number
Mass/Moles
100

Where are protons located?

Inside the nucleus

100

What is the mass of a proton?

1 amu

100

What is mass number?

the sum of nucleons

100
What are isotopes?
Isotopes are varieties of the same atom with a different amount of neutrons
100
Define the average atomic mass
is the weighted average of all the naturally occurring isotopes of an element
100

What is Avogadro’s number?

6.022 × 10²³

100

What is the molar mass of carbon?

12.01 g/mol

200
Where are electrons located?
outside the nucleus
200

What is the exact mass of an electron?

1/1837 amu

200

what is the formula used to find mass number?

Protons + Neutrons = Mass Number

200
Are the number of protons altered in an isotopes?
No, the number of protons remains the same
200
What is the formula of average atomic mass
(mass of isotope)(abundance) + (mass of isotope)(abundance) + ...
200

Avogadro’s number represents how many ____ in one mole of a substance?

Particles (atoms, molecules, or ions)

200

What conversion factor converts moles of an element to grams?

Molar mass (g/mol)

300

where are neutrons located?

Inside the nucleus

300
What is the charge on electrons?
Negative
300
What is the Atomic Number equal to?
The number of protons
300

How many neutrons are there in Na-30?

19 neutrons

300
What form must abundance be in to calculate the average atomic mass?
Decimal
300

If you have 2.00 moles of helium atoms, how many atoms is that?

1.204 × 10²⁴ atoms

300

How many grams are in 2.00 mol of sodium?

46.0

400
what are the nucleons?
protons and neutrons
400
What is the charge on protons?
Positive
400

What is the Mass number of oxygen

16

400
how many protons are there in O-87
8 protons
400
Find the average atomic mass: 50% Au-197 ,50% Au-198
197.5 amu
400

Convert 1.50 × 10²⁴ atoms of neon to moles.

2.49 mol

400

Convert 1.20 × 10²⁴ atoms of potassium to grams.

78.3 g

500
Are electrons ever in the nucleus?
No
500

Neutrons have what kind of charge?

They have no charge, they are neutral

500

What is the atomic number of sodium?

11

500
How many neutrons are there in O-87?
79 Neutrons
500
What is the unit that is used for average atomic mass?
amu
500

What conversion factor converts moles of an element to atoms?

Avogadro’s number

500

How many atoms are in 50.0 g of calcium?

7.52 × 10²³ atoms

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