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Agata [3.3K]
2 years ago
13

Match the parts of the element box as is making a periodic table key

Chemistry
1 answer:
polet [3.4K]2 years ago
3 0

Answer:

10 is the atomic number

Ne is the chemical symbol

Neon is the element name

20 is the atomic mass

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Which of the following is true in regard to ions? A. A cation will hold a positive charge if it gains one or more electrons. B.
tigry1 [53]

Answer:

B. An ionized atom has a number of protons that is unequal to the number of electrons.

Explanation:

For a neutral atom , the number of proton and electron is equal. An ionized atom has either loss or gain electron, thereby making the number of proton and electron unequal. The answer B is true because an ionized atom has either loss or gain electron to make the number of electron and proton unequal.

Option A is incorrect because a cations holds a positive charge when it loss one or more electron not when it gains one or more electron(s). Anions possess negative charge for gaining electron(s).

Option C is not true because ions can also carry negative charges and they are called anions.

Option D is false because losing one or more electron will turn an atom to a cations.

7 0
3 years ago
What type of compound does the formula, CuCl2, represent?<br> a. ionic salt<br> b. covalent molecule
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The answer is:  [B]:  "ionic salt" .
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Note:  There is no "sharing of electrons" among the elements in this compound; so this compound in NOT a "covalent molecule".

However, there is ionic bonding:  Cu²⁺ and  Cl⁻  ;  to form:  "CuCl₂" .
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7 0
3 years ago
When someone’s immune system overreacts to something harmless it’s called:
ruslelena [56]
I feel like it would be c
5 0
3 years ago
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What is the sequence of the complementary strand for the DNA ,gcaa
Vinil7 [7]

Answer:

1. GCAA= CGTT

2. TCAG =AGTC

3. CGTT= GCAA

4. ATAT = TATA

5. ATGA = TACT

Explanation:

A goes to T

C goes to G

T goes to A

G goes to C

4 0
3 years ago
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18. For the recoton 2H2 + O2 + 2H20. how many moles of water can be produced from 23.2 mol of
grigory [225]

Answer:

23.2 mols

Explanation:

(23.2 mol H2)(2 mol H2O) /(2 mol H2) = 23.2 mol H2O

you have to do stoichiometry - so start of with what you are given, which is 23.2 mols of hydrogen, then to cancel out mols of hydrogen, divide by what is in the equation: so 23.2 mols H2 / 2 mols H2. Next, to get mols of H2O multiply that number by the mols of water in the equation.

this answer makes sense because as you can see in the equation, there are 2 H2:2 H2O, so the amounts should be the same.

hope this helps! make sure to practice because it is ESSENTIAL that you understand this, especially if you plan on taking ap chem. good luck! :)

6 0
3 years ago
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