1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Anestetic [448]
3 years ago
7

Write the appropriate symbol for each of the following isotopes: (a) Z 74, A 186; (b) Z 80, A 201; (c) Z 34, A 76; (d) Z 94, A 2

39.
Chemistry
1 answer:
beks73 [17]3 years ago
6 0

Answer:  a)  _{74}^{186}\textrm{W}

b) _{80}^{201}\textrm{Hg}

c)  _{34}^{76}\textrm{Se}

d) _{94}^{239}\textrm{Pu}

Explanation:

General representation of an element is given as:_Z^A\textrm{X}

where,

Z represents Atomic number

A represents Mass number

X represents the symbol of an element

Mass number is defined as the sum of number of protons and neutrons that are present in an atom.

Mass number = Number of protons + Number of neutrons

In an atom, when neutrons or protons are lost or gains, it directly affects the mass number of an atom.

Atomic number is defined as the number of protons or number of electrons that are present in an atom.

It is characteristic of a particular element.

Atomic number = Number of electrons = Number of proton

a) Z 74, A 186: _{74}^{186}\textrm{W}

b) Z 80, A 201: _{80}^{201}\textrm{Hg}

c) Z 34, A 76: _{34}^{76}\textrm{Se}

d) Z 94, A 239.: _{94}^{239}\textrm{Pu}

You might be interested in
A glass blower can bend and shape a piece of glass that has been heated. Is glass a crystalline or an amorphous solid?
zavuch27 [327]

it would be a crystalline solid, because it could be extended in multiple directions.

5 0
3 years ago
Write the name and formula of the compound made of magnesium and fluorine
Alexxx [7]

Answer:

Name : Magnesium Fluoride

Formula : MgF2

Explanation:

Give me brainliest

8 0
3 years ago
Do all waves have the same speed
Tomtit [17]
No, I could be wrong tho
6 0
3 years ago
Read 2 more answers
Which pair of ions can form an ionic bond with each other and why? A.Cu and Ag; They are both metal ions.B. S and O; They have l
kap26 [50]
Opposite pairs form ionic bonds, due to this the answer is D - Li and Br; They have unlike charges.
5 0
3 years ago
Read 2 more answers
How do molecular bonds form?
vaieri [72.5K]

Answer:

"A molecular, or covalent bond, is formed when atoms bond by sharing pairs of electrons. This sharing can occur from atom to atom, or from an atom to another molecular bond."

Explanation:

Google

8 0
2 years ago
Read 2 more answers
Other questions:
  • What is the concentration of O2(g), in parts per million, in a solution that contains 0.008 gram of O2(g) dissolved in 1000. gra
    12·2 answers
  • PLEASE ANSWER!!!!!!!endothermic and exothermic reactions lab report
    6·2 answers
  • 2. Peppered moths are typically either white with black speckles or black with white speckles. Before the Industrial Revolution,
    7·1 answer
  • Balance the equation for the reaction given below:<br> CuCl2 + NaNO3  Cu(NO3)2 + NaCl
    14·1 answer
  • When heated, allyl aryl ethers and allyl vinyl ethers undergo a reaction called a Claisen rearrangement, a concerted reorganizat
    15·1 answer
  • The addition of a base to water decreases the ph of a solution
    14·1 answer
  • Which molecule will undergo only London dispersion forces when interacting with other molecules of the same kind? a.HCl b.C2H5OH
    7·1 answer
  • Which of the following is an example of a response to stimulus?
    6·2 answers
  • Can somebody please help with this question?
    13·1 answer
  • Please help me with this.<br><br><br>And show all work as well ASAP!!​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!