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Dmitrij [34]
3 years ago
14

What is the atomic number of all Calcium Isotopes?

Chemistry
2 answers:
sweet-ann [11.9K]3 years ago
8 0

Explanation:

this is the answer friend

ryzh [129]3 years ago
4 0

Answer:

all calcium atoms have an atomic number of 20 but there are three isotopes of calcium - 39, 40, and 42

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What is the formal charge on the hydrogen atom in hbr? use the periodic table as needed?
Westkost [7]
A covalent bond is formed between H and Br
The structure of HBr is as follows
H —Br
Formal charge for atoms are the charges for individual atoms in compounds.
Formal charge can be calculated as follows ;
Formal charge of atom = number of valence electrons -( number of bonds + number of lone pair electrons)
H has 1 valence electron, 1 bond and 0 number of lone pair electrons
Formal charge of H = 1 -1 -0 = 0
H has 0 charge
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S
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Answer:

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Explanation:

B

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The process to create a protected area takes a long time because there's numerous things that have to be taken in account and sorted out before the area gets that kind of legal status.

Usually there's people living in the area that is supposed to be protected, though it is mostly small settlements. The people living there are connected with that area, use the resources, and their lives are largely based and dependent on it. In order for any problems to be avoided, these people should all be educated, deals to be made with them, and properly negotiated so that the area wouldn't have any damage, but also them to be able to sustain themselves.

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