Quiz 3 (Chapter 4)

The atomic number =

• the number of protons

• the mass number

• the number of neutrons

• the specific heat capacity

Match each element with the number of neutrons in its nucleus (rounded to the nearest whole number).

• Neutrons in the nucleus of Molybdenum-91 (Mo, atomic number 42)

• 49

• Neutrons in the nucleus of Tin-131 (Sn, atomic number 50)

• 81

• Neutrons in the nucleus of Zirconium-91 (Zr, atomic number 40)

• 51

• Neutrons in the nucleus of Calcium-40 (Ca, atomic number 20)

• 20

The isotope Ba-140 has (a)   neutrons.

• 140 neutrons
• 81 neutrons
• 137 neutrons
• 84 neutrons

Gold has an atomic number of 79. It will generally have:

• 79 electrons

• 79 neutrons

• 118 electrons

• A mass number of 196.

Tags

NGSS.MS-PS1-1

What is true about the isotope N-15? (check all that are true)

• It has 7 protons

• It has 7 electrons

• It has 7 neutrons

• It has a mass number of 15

• It is the most common isotope of N.

Tags

NGSS.MS-PS1-1

The atomic mass of Palladium (Pd) is 106.4. The number of protons in its nucleus is (a)   .

• 106
• 46
• 60
• Maybe 48.

I am an isotope of an atom with a mass number of 206. My nucleus contains 125 neutrons. Who am I?

• lead

• thallium (Tl)

• bismuth (Bi)

• mercury

Tags

NGSS.HS-PS1-8

Consider: ¹²²Sb^3-

Check all that apply.

• 122 neutrons

• 51 protons

• 54 electrons

• 48 electrons

• 71 neutrons

Tags

NGSS.MS-PS1-1

There are 2 common isotopes for chromium, Cr-52 and Cr-53. The only difference is (a)  

• Cr-53 has one more neutron.
• Cr-52 has one less electron.
• Cr-53 has one more electron.
• Cr-52 has 24 protons.

Tags

NGSS.MS-PS1-1

An ion of bromine has a charge of -1. It would have:

• 34 electrons

• 36 electrons