2. Atoms & Elements

Isotopes

2. Atoms & Elements

Isotopes

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03:54

What are Isotopes? | Chemistry Basics

American Chemical Society

MooMooMath and Science

Isotopes | Matter | Physics | FuseSchool

FuseSchool - Global Education

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04:25

What Are Isotopes? | Chemistry Basics

The Organic Chemistry Tutor

Calculating the Protons, Neutrons and Electrons for an Atom

Mr Barnes

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Multiple Choice

Which of the following answers give the correct number of subatomic particles for ?

Which of the following answers give the correct number of subatomic particles for ?

Fill in the gaps for the following table of atoms.

Isotopes of a given atom

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Textbook Question

Indicate the number of protons and neutrons in the following nuclei: (b) 193Tl.

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Textbook Question

Indicate the number of protons and neutrons in the following nuclei: (c) neptunium-237.

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Textbook Question

Consider an atom of 32P. (d) Are either of the atoms obtained in parts (b) and (c) isotopes of 32P? If so which one?

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Textbook Question

Consider an atom of 58Ni. (c) What is the symbol for the isotope of 58Ni that possesses 33 neutrons?

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Textbook Question

(b) What is the identity of the element whose isotopes you have selected?

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Textbook Question

(a) Which two of the following are isotopes of the same element: 10646X, 10746X, 10747X?

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Textbook Question

Write the correct symbol, with both superscript and subscript, for each of the following. (d) the isotope of calcium that has an equal number of protons and neutrons.

534

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Textbook Question

Write the correct symbol, with both superscript and subscript, for each of the following. Use the list of elements in the front inside cover as needed: (b) the isotope of mercury with mass number 201

907

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Textbook Question

Write the correct symbol, with both superscript and subscript, for each of the following. Use the list of elements in the front inside cover as needed: (a) the isotope of hafnium that contains 106 neutrons

778

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Textbook Question

In the following drawings, red spheres represent protons, and blue spheres represent neutrons. Which of the draw-ings represent different isotopes of the same element, and which represents a different element altogether? (a)

Write isotopic symbols in the form X-A (e.g., C-13) for each isotope. d. the hydrogen isotope with one neutron

1023

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Textbook Question

Write isotopic symbols in the form X-A (e.g., C-13) for each isotope. c. the uranium isotope with 146 neutrons

1251

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Textbook Question

Write isotopic symbols in the form X-A (e.g., C-13) for each isotope. b. the silver isotope with 62 neutrons

510

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Textbook Question

Write isotopic symbols in the form X-A (e.g., C-13) for each isotope. a. the silver isotope with 60 neutrons

498

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Textbook Question

Write isotopic symbols in the form AZX for each isotope. c. the potassium isotope with 21 neutrons

646

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Textbook Question

Write isotopic symbols in the form AZX for each isotope. b. the copper isotope with 36 neutrons

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Textbook Question

Write isotopic symbols in the form AZX for each isotope. a. the copper isotope with 34 neutrons

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Textbook Question

Determine the number of protons and the number of neutrons in each isotope. d. 208 82Pb

Determine the number of protons and the number of neutrons in each isotope. a. 14 7N

Determine the number of protons and the number of neutrons in each isotope. a. 40 19K b. 226 88Ra c. 99 43Tc d. 33 15P

The table to the right gives the number of protons (p) and neutrons (n) for four isotopes. (a) Write the symbol for each of the isotopes.

254

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Textbook Question

The natural abundance of 3He is 0.000137%. (b) Based on the sum of the masses of their subatomic particles, which is expected to be more massive, an atom of 3He or an atom of 3H (which is also called tritium)?

843

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Textbook Question

The natural abundance of 3He is 0.000137%. (a) How many protons, neutrons, and electrons are in an atom of 3He?

764

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Textbook Question

The element argon has three naturally occurring isotopes, with 18, 20, and 22 neutrons in the nucleus, respectively. (a) Write the full chemical symbols for these three isotopes.

1775

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Textbook Question

The first atoms of seaborgium (Sg) were identified in 1974. The longest-lived isotope of Sg has a mass number of 266. (a) How many protons, electrons, and neutrons are in an 266Sg atom?

625

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Textbook Question

The radioactive isotope cesium-137 was produced in large amounts in fallout from the 1985 nuclear power plant disas-ter at Chernobyl, Ukraine. Write the symbol for this isotope in standard format.

710

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Textbook Question

Write symbols for the following isotopes: (a) Z = 58 and A = 140 (b) Z = 27 and A = 60

1352

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Textbook Question

Nuclei with the same number of neutrons but different mass numbers are called isotones. Write the symbols of four isotones of 236Th.

1505

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Textbook Question

How many protons, neutrons, and electrons are in each of the following atoms? (d)

390

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Textbook Question

How many protons, neutrons, and electrons are in each of the following atoms? (c)

403

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Textbook Question

How many protons, neutrons, and electrons are in each of the following atoms? (b)

319

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Textbook Question

How many protons, neutrons, and electrons are in each of the following atoms? (a)

262

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Textbook Question

How many protons and neutrons are in the nucleus of the following atoms? (d)

266

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Textbook Question

How many protons and neutrons are in the nucleus of the following atoms? (c)

338

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Textbook Question

How many protons and neutrons are in the nucleus of the following atoms? (b)

266

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Textbook Question

How many protons and neutrons are in the nucleus of the following atoms? (a)

310

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Textbook Question

Which of the following isotope symbols can't be correct? (a) (b) (c) (d)

529

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Textbook Question

Fluorine occurs naturally as a single isotope. How many protons, neutrons, and electrons are present in deuterium fluoride (2HF)? (Deuterium is 2H.)

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Open Question

Lithium has 3 protons. How many neutrons are in the isotope Lithium-8?

What is the mass number of the isotope with the symbol ³⁷₁₇Cl?

141

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Open Question

Which of these refers to atoms with the same atomic number but different atomic masses?

135

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Open Question

The atomic number of fluorine is 9 and its atomic mass is 19. How many neutrons does fluorine have?

213

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Open Question

One isotope of sodium has 11 protons and 7 neutrons. What is the mass number of this isotope?

156

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Open Question

Which pair of atoms constitutes a pair of isotopes of the same element?

603

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Open Question

The oxygen isotope with 8 neutrons

What is the mass number of the isotope with the symbol ³⁷Cl₁₇?

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Open Question

Lithium has 3 protons. How many neutrons are in the isotope Lithium-8?

195

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Open Question

Atoms of the same element, zinc for example, have the same number of

173

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Open Question

How many protons, neutrons, and electrons are there in a neutral atom of ¹³¹I (iodine-131)?

133

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Open Question

Two isotopes of the same element will have the same number of _____ but a different number of ____.

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Open Question

How many protons, neutrons, and electrons are there in a neutral atom of ³⁰P (phosphorus-30)?

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Open Question

An isotope of yttrium has 39 protons and 59 neutrons. What is the mass number of that isotope?

146

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Open Question

The superscript preceding each hydrogen atomic symbol (H) represents which of the following?

141

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Open Question

All of the atoms making up any given element have the same number of ________.

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Open Question

How many protons, neutrons, and electrons make up an atom of nitrogen-15?

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Open Question

Can two atoms with the same mass number ever be isotopes of each other? Explain.

111

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Open Question

Can two atoms with the same mass number ever be isotopes of each other?

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2. Atoms & Elements

Isotopes

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