Chemistry Isotopes

How many neutrons are in the isotope Carbon-14?

• 6

• 8

• 12

• 14

What is the complete symbol for a cobalt atom with a mass number of 60?

• A

• B

• C

• D

What is the mass-form for the isotope with 38 protons and 50 neutrons?

• Stronium-88

• Stronium-50

• Tin-88

• Tin-50

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 neutrons does an atom of the isotope Neon-22 have?

• 12
• 10
• 22
• 20

which atom has  4 neutrons?

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

What is an isotope?

• An atom with an unstable nucleus
• An atom with more/less neutrons than 'normal'
• An atom with an isotopic charge
• An atom with more/less protons than 'normal'

Isotopes are atoms of the same element that have different

• principal chemical properties.

• masses.

• numbers of protons.

• number of electrons.

As the mass number of an element's isotopes of an element increases, the number of protons

• decreases.

• increases.

• remains the same.

• doubles each time the mass number increases.