2. Atoms & Elements

Isotopes

What are Isotopes?

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.

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? 

Which of the following answers give the correct number of subatomic particles for <img src="https://static.studychannel-prd.pearsonprd.tech/courses/general-chemistry/thumbnails/images/0a47e7ad"class="fr-fic fr-dii">?

Fill in the gaps for the following table of atoms.

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.

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

Isotopes, Percent Abundance, Atomic Mass | How to Pass Chemistry

Which of the following answers give the correct number of subatomic particles for <img src="https://static.studychannel-prd.pearsonprd.tech/courses/general-chemistry/thumbnails/images/22bc73fa"class="fr-fic fr-dii"style="width:39px;">?

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

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

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

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

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

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

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

Calculating the Protons, Neutrons and Electrons for an Atom

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

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

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

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

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

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

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

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

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

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.

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

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

What is an Isotope?

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

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

 have a different number of protons and electrons. 

 The number of protons defines the element but isotopic masses differ due to the number of neutrons. 

 have the same number of protons, but a different number of neutrons. 

 Correct, the mass number differs for each isotope of an element. 

 are usually man-made and never occur naturally. 

 all have a natural abundance equal to 100%. 

 Isotopes have different mass numbers but the same atomic number. 

Isotopes are elements with the same number of protons, but different number of neutrons.&nbsp;

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

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

Isotopes | Matter | Physics | FuseSchool

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

What are Isotopes? | Chemistry Basics

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

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

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

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

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)?

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

What Are Isotopes? | Chemistry Basics

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) <img src="https://lightcat-files.s3.amazonaws.com/problem_images/a146fce047d7a54a-1668027567850.jpg" alt="" />
(b) <img src="" alt="" />
(c) <img src="" alt="" />

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

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

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.

Isotopes Example 1

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1. Intro to General Chemistry

3. Chemical Reactions

4. BONUS: Lab Techniques and Procedures

5. BONUS: Mathematical Operations and Functions

6. Chemical Quantities & Aqueous Reactions

7. Gases

8. Thermochemistry

9. Quantum Mechanics

10. Periodic Properties of the Elements

11. Bonding & Molecular Structure

12. Molecular Shapes & Valence Bond Theory

13. Liquids, Solids & Intermolecular Forces

14. Solutions

15. Chemical Kinetics

16. Chemical Equilibrium

17. Acid and Base Equilibrium

18. Aqueous Equilibrium

19. Chemical Thermodynamics

20. Electrochemistry

21. Nuclear Chemistry

22. Organic Chemistry

23. Chemistry of the Nonmetals

24. Transition Metals and Coordination Compounds

[BOOK CHEM] Clutch Version

Millikan Oil Drop Experiment

The Oil Drop Experiment helped with determining the fundamental charge of the electron.&nbsp;

Ions

Ions represent elements that possess either a positive charge or a negative charge.&nbsp;

Periodic Table: Charges

Elements lose or gain electrons to have the ideal number of outer shell electrons like the noble gases.&nbsp;

Law of Definite Proportions

"Different samples of a pure chemical compound always contain the same proportions of elements by mass."

Periodic Table: Classifications

The Periodic Table contains 3 Major Classifications when describing its elements

Isotopes are atoms of an element that have the same atomic number, but different mass number.&nbsp;

The Atom

The atom represents the basic functional unit in chemistry

Mole Concept

The Mole Concept involves the interconversions between different unit amounts of a substance.

Periodic Table: Representative Elements & Transition Metals

The Groups of the Periodic Table can be broken down into the Representative Elements and Transition Metals

Atomic Theory

John Dalton, one of the "Fathers of Chemistry"is credited with modernizing the Atomic Theory.

Subatomic Particles

The atom is composed of 3 subatomic particles:neutrons, protons, and electrons.

Periodic Table: Elemental Forms

The elements of the Periodic Table exist in different elemental forms in the natural world

Periodic Table: Phases

Under standard conditions of temperature and pressure, the elements can exist as solids, liquids or gases

Atomic Mass

The atomic mass of an element includes the masses of all 3 subatomic particles of neutrons, protons and electrons.&nbsp;

Periodic Table: Group Names

The Periodic Table can be further classified into Periods and Groups.&nbsp;

Law of Conservation of Mass

"In a chemical reaction, no matter is created or destroyed, but instead changes form."

Calculating Molar Mass

Molar Mass is a physical property that represents the mass of a substance divided by the amount of that substance.

Rutherford Gold Foil Experiment

The Gold Foil Experiment helped with the discovery of the positively charged nucleus.

Law of Multiple Proportions

“When 2 elements (A &amp; B) form different compounds, the mass of Element B that combine with 1 g of A are a ratio of whole numbers."

Periodic Table: Element Symbols

The Element Symbols of the Periodic Table represent the abbreviated form of an element