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
Daniel [21]
3 years ago
9

How many neutrons does calcium have? .20. 60. 79. 40

Chemistry
1 answer:
soldi70 [24.7K]3 years ago
4 0

Answer:

20

Explanation:

Atomic number/proton number = 20 (protons in nucleus)

Atomic mass number = 40 (protons + neutrons in nucleus)

40 - 20 = 20

You might be interested in
Can someone please help 7-10 with some work shown a bit , pleaseeeeeee
Oksana_A [137]

Answer:

7.] 597.11 Calories

8] 50208 joules

9] 2.05016 kilojoules

10] 0.0142256 kilojoules

Explanation:

just google how to do it. you can find some good examples.

hope this helps a bit!

brainliest?

also, im in 7th, im in high school algebra already. (im in advanced stuff)

ty!

5 0
3 years ago
What occurs in dissociation
vladimir1956 [14]

Answer:- B. Solvent molecules surround solute ions.

Explanations:- When an ionic solute that has positive and negative ions is dissolved in a solvent like water then the solute ions are surrounded by the water molecules in a way so that the highly electron negative oxygen atom of water is towards the positively charged ion of the solute and less electron negative which is hydrogen atom that has partial positive charge, surrounds the negatively charged ion of the solute.

Due to these forces made by the solvent molecules, the solute is broken into the ions and get dissolved in solvent.

Please mark brainliest. :)

6 0
3 years ago
Read 2 more answers
Which of these is a challenge related to nuclear fusion reactions?
juin [17]

Answer: the answer is c

Explanation:

i took the quizz

3 0
2 years ago
How much Pb(NO3)2 would need to be added to 100 mL of water to make a saturated solution at 40°C.
gtnhenbr [62]

Answer:

70g of Pb(NO3)2 would need to be added

Explanation:

As you can see in the solubility graph of lead nitrate, Pb(NO₃)₂, the solubility of this salt (That is, the maximum amount of the salt that can be dissolved in 100g of the solvent producing a homogeneous solution) is 70g in 100g of water = 70g of the salt in 100mL of water.

A saturated solution is also defined as solubility: The maximum amount of a solute that can be dissolved in a solvent.

That means:

70g of Pb(NO3)2 would need to be added

4 0
3 years ago
What is the scientific name of lion
Aleksandr-060686 [28]

Answer:

the scientific name of lion is

Panthera leo

5 0
3 years ago
Read 2 more answers
Other questions:
  • If you mix a typical aluminum ion (al, atomic no. = 13) with a typical oxygen ion (o, atomic no. = 8), what compound is formed?
    9·1 answer
  • Who discovered that geologic changes are cyclical?
    8·1 answer
  • true or false does the octet rule state that all atoms want to have 8 valence electrons in the outer shell
    12·1 answer
  • How many protons does one atom of sulfur have
    10·2 answers
  • Explain how you would make 500ml of a 0.100 m naoh solution
    5·1 answer
  • Choose the correct statement regarding the behavior of water.
    12·1 answer
  • How many atoms are in 2.70 moles of iron (Fe) atoms?
    8·1 answer
  • Which property is better explained by the band theory than by the sea-of-electrons model?
    14·1 answer
  • How does a thermometer measure temperature?
    11·1 answer
  • The image shows a projection map.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!