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
Inessa05 [86]
3 years ago
10

If an isotope of an element has 40 neutrons and a mass number of 79, how many electrons must it have?

Chemistry
1 answer:
34kurt3 years ago
5 0

Answer: 39 electrons

Explanation: Subtract 79 by 40 to get the atomic number (amount of protons) which is 39. The number of electrons must be the same as the number of protons if it's not an ionic compound so the amount of electrons is the same amount of protons.

You might be interested in
2. What does the diamond-shaped symbol stand for in a consumer product label?
Nikitich [7]

The red diamond represents the potential hazards that are associated with the product.

4 0
3 years ago
Because ________ change the identity of the substances involved, they are hard to reverse
sveta [45]
Chemical is the answer to the question, but nuclear could also be a valid one since it is nearly impossible to reverse that.
4 0
3 years ago
If you use 19 mL of 0.100 M KMnO4, how many moles have you used? The answer has to be in four decimal places (do not forget the
Scorpion4ik [409]
1)

Volume = 19 / 1000 = 0.019 L

n = M * V

n = 0.100 * 0.019

n = 0.0019 moles
__________________________

2)

 M₁ * V₁ = M₂* V₂

5.0 * V₁ = 1.0 * 152

5.0 V₁ = 152

V₁ = 152 / 5.0

V₁ = 30.4 mL
______________________________________

<span>hope this helps!</span>
3 0
3 years ago
In Section 5.6, we learned that triple bonds are stronger and shorter than single bonds. For example, a C−CC−C single bond has a
olya-2409 [2.1K]

Answer:the strength of a bond depends on the amount of overlap between the atoms.

Explanation:the greater the overlap the greater the strength of the bond.

6 0
3 years ago
How is electron movement related to the bonding in sodium chloride?
stepladder [879]
Cl is highly electronegative and will actually pull away 1 electron from sodium, forming an ionic bond. 
5 0
3 years ago
Read 2 more answers
Other questions:
  • Given that a = 13 cm and B = 12 cm work out x
    8·2 answers
  • Assuming that compound a has only c, h, and one n atoms, determine the molecular formula, and then draw a possible structure if
    8·1 answer
  • The water in a 150-mL flask is poured into a beaker that contains 600 mL of ethyl alcohol. Which substance is the solvent in thi
    12·2 answers
  • Please helppppppp. I need this D:<br><br> 50 points
    6·1 answer
  • Amy found a volume of red liquid to be 55.1 ml, and have a mass of 8.199g. What is the density of her
    15·1 answer
  • an aluminum kettle weighs 1.05 kg how much heat and joules is required to increase the temperature of this kettle from 23° c to
    9·1 answer
  • C.
    5·1 answer
  • How many total atoms are in K2(H2AsO4)2<br> 5<br> 18<br> 16<br> 12
    8·1 answer
  • 1. Write equations for the reaction of sodium with water and with dilute acids. (2 marks)​
    14·1 answer
  • Mandy made the following table describing the conditions required to form sleet and snow, but left something out. Which word sho
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!