AP Chemistry Topic 1.5-1.8

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

Subatomic particles with a positive charge

• neutrons
• atomic mass
• protons
• isotopes

Value representing the number of protons in an element

• Atomic Mass
• Mass Number
• Valence Electrons
• Atomic Number

A charged atom

• Ion
• Isotope
• Electron Cloud
• Quark

How many protons does this isotope of titanium have?

• 48
• 22
• 26
• 70

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

• 53
• 36
• 89
• 125

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 isotopes are shown in this mass spectrum?

• 1
• 84
• 86
• 4

How many isotopes of this element are shown in the mass spectrum?

• 98
• 7
• 100
• 95.9 g/mol

Based on the mass spectrum, which isotope of chlorine is most abundant?

• ³⁵Cl

• ³⁷Cl

• ⁷⁰Cl

• ⁷²Cl