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
gtnhenbr [62]
3 years ago
6

The valency of calcium is2 ? what does it mean​

Chemistry
1 answer:
nalin [4]3 years ago
5 0

Answer:

hope you like it

Explanation:

because ouytermost shell contains two electrons

calcium is in group 2 so its valency is two valency is the number of outer shelll electrons it needs to have an stable outer shell . it needs 2 more .

You might be interested in
What is the maximum number of electrons that can occupy an orbital labeled dxy?
Rina8888 [55]
2 is the maximum number of electrons that can occupy an orbital labeled dyx
Hope this help :)
6 0
3 years ago
.
zimovet [89]

Answer:

498 kj/mol

Explanation:

Chemical reactions occur as a result of bond breaking and bond formation.

The bonds in reactants are broken and atoms are rearranged to form new bonds.

During bond breaking energy is absorbed to break the bonds of reactants while bond formation involves the release of energy during the formation of new bonds.

In our case;

In 1 mole of the Oxygen molecule, there is one O=O bond

Energy absorbed to break O=O is 498 kJ/mol

Therefore, the ΔH required to break all the bonds in one mole of Oxygen(O₂) molecules is 498kJ/mol.

Note that, bond breaking is endothermic since energy is absorbed  from the surroundings.

mark brainliest pls

8 0
3 years ago
How many moles of MgCL2 are there in 311 g of the compound
Volgvan
There are 3.2664292991356043 moles of MgCl2
5 0
4 years ago
I WILL GIVE U BRAINLY !!!!The diagram shown is an example of the element
motikmotik
Your answer is a, boron. Boron has 5 protons, 6 neutrons, and 5 electrons. Hope this helps!
3 0
3 years ago
Read 2 more answers
NEED HELP NOW!! Scientists study two kinds of jellyfish. One lives at the surface of the ocean; the other lives in the deep regi
bagirrra123 [75]
It’s D False. I pretty sure it’s not good enough but it’s not going there anymore lol I can’t yeyeuiiw
7 0
2 years ago
Other questions:
  • An element’s ability to react, or bond, with another element is an example of a
    15·1 answer
  • What drug is the greatest challenge for Forensic Science? What drug in specific is a threat in Forensics.
    10·2 answers
  • An open flask sitting in a lab fridge looks empty, but we know that actually it is filled with a mixture of gases called air. if
    15·1 answer
  • Identify the alkane that contains four carbons.
    12·1 answer
  • A student mixed 20.00 grams of calcium nitrate, 10.00 grams of sodium nitrate, and 50.00 grams of aluminum nitrate in a 5.00 Lit
    14·1 answer
  • PLEASE HELP ASAP
    12·2 answers
  • Which molecule is least likely to be able to travel via the macula communicans pathway
    7·1 answer
  • Given the balanced chemical equation for the decomposition for INO, and the rate of disappearance of INO, write the expressions
    11·1 answer
  • How could you put the understanding of the size of a drop of water to good use in Chemistry?
    13·1 answer
  • A 3.00 L flexible container holds a sample of hydrogen gas at 153 kPa.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!