Atomic Mass
Atomic Number
Mass Number
Isotopes
100

What is the unit of measurement used to quantify an atom’s mass?

What is the atomic mass unit (amu)?

100

What identifies the type of atom?


What is the number of protons?

100

What is the formula to calculate mass number

What is mass number = number of protons + number of neutrons?

100

What are atoms of the same element with different mass numbers called?


What are isotopes?

200

How do the masses of protons and neutrons compare to the mass of electrons?

What is that protons and neutrons are about 1800 times more massive than electrons?

200

How does the atomic number relate to the number of protons in an atom?


What is the atomic number is equal to the number of protons?

200

 How do you find the number of neutrons in an atom?


What is by subtracting the atomic number from the mass number?

200

Can the number of protons in an isotope change?


What is no, the number of protons never changes for an element?

300

What is the approximate mass of a proton or neutron in atomic mass units?

What is about 1 amu?

300

Can an atom have a different atomic number and still be the same element?


What is no, atoms of different elements have different numbers of protons?

300

An atom has 15 protons and 16 neutrons. What is its mass number?

What is 31?

300

How do scientists denote an isotope?

What is by writing the element's name followed by the mass number?

400

Why can the mass of an electron be ignored when calculating atomic mass?

What is because the electron mass is very small compared to protons and neutrons?

400

If an element has an atomic number of 8, how many protons does it have?

What is 8 protons?

400

If an atom has a mass number of 20 and an atomic number of 6, how many neutrons does it have?

What is 14 neutrons?

400

If Carbon has a mass number of 14, how is it written?

What is Carbon-14?

500

If an atom has 6 protons and 6 neutrons, what is its mass number?

What is 12 amu?

500

If an atom has a total of 10 protons, what is its atomic number?

What is 10?

500

What do you call the sum of protons and neutrons in an atom's nucleus?

What is the mass number?

500

What must change in an atom for its mass number to differ?

What is the number of neutrons?

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