Isotope and Atomic Structure

What subatomic particles would you find in the nucleus of an atom?

• Protons only
• Protons and Neutrons
• Neutrons and Electrons
• Protons and Electrons 

What is the atomic number?

• the number of protons

• the number of protons and neutrons

• the number of neutrons

• the number of electrons

What is the mass number defined as?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons

A fluorine atom has 9 protons and 10 neutrons. What is the atomic number of fluorine?

• 9
• 10
• 19
• 1

A phosphorus atom has 15 protons and 16 neutrons. What is the mass number?

• 15
• 16
• 31
• 1

If X is the symbol for an element, which of the following two symbols represent    isotopes of the same element?     I. ⁷⁷₃₅X  II. ⁷⁷₃₃X  III. ⁸¹₃₇X  IV. ⁸¹₃₅ X

• I and II
• III and IV
• I and IV
• I and III

How many neutrons does the isotope below have?     ⁸⁹ ₃₆Kr

• 53
• 36
• 89
• 125

which atom has  4 neutrons?

• Li-6
• Li-7
• Li-8
• they have the same # of neutrons

How many neutrons does the isotope of lithium have?

• 8
• 3
• 4
• 5

How many protons does this isotope of titanium have?

• 48
• 22
• 26
• 70