Isotopes and Mass Number

The number '14' in the name Carbon-14 represents the ______.

• mass number
• atomic number
• number of protons
• number of electrons

How many neutrons does  Fluorine-19 contain?

• 9
• 19
• 10

How many protons does Fluorine-19 contain?

• 9
• 19
• 10

Tags

NGSS.MS-PS1-1

How many electrons does Fluorine-19 contain?

• 9
• 19
• 10

What is the atomic number of Fluorine-19?

• 9
• 19
• 10

What is the mass number of Fluorine-19?

• 9
• 19
• 10

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

Tags

NGSS.HS-PS1-8

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

• 53
• 36
• 89
• 125

Tags

NGSS.HS-PS1-8

How many protons does this isotope of titanium have?

• 48
• 22
• 26
• 70

Tags

NGSS.MS-PS1-1

What is the name of the pictured isotope?

• Chlorine-Schmorine
• Chlorine-17
• Chlorine-35
• Chlorine-18

Tags

NGSS.MS-PS1-1