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kiruha [24]
2 years ago
14

PLEASE PLEASE PLEASE HELP ME HAS TO BE TURNED IN AT 9:00

Chemistry
1 answer:
Kay [80]2 years ago
8 0

Answer:

Option D will be the answer.

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The isotope of an unknown element, X, has a mass number of 79. The most stable ion of this isotope has 36 electrons and has a 22
Tema [17]

Answer:

A) False

B) True

C) True

D) True

Explanation:

A) False. If the charge of the atom is +2 means that you have two protons more than number of electrons. If you have 36 electrons you must have <em>38 protons.</em> Also, the electrons are not in the nucleus.

B) True. The isotope of X contains 38 protons, two more than the electron number.

C) True. The mass number is the number of protons + number of neutrons.

If the mass number is 79 and there are 38 protons you must have 41 neutrons.

D) True. You can now the identity of the atom with the number of protons that is the same than atomic number. The strontium, Sr, is the atom with 38 as atomic number.

I hope it helps!

3 0
3 years ago
Noble gases are unreactive because of their electronic structures. The kind of reasoning that states "if other elements could be
Goshia [24]

Answer:

C. Deductive reasoning

Explanation:

Deductive reasoning is a reasoning or logical process whereby a conclusion is drawn based on the belief of multiple premises that are generally assumed to be true. It is a logical process in which one or multiple statements reaches a logical conclusion.

In the question, the statement assumed to be true is that <em>noble gases are unreactive because of their electronic structures.</em>

The conclusion thus drawn from the premise is that <em>if other elements could be made to achieve noble gases electronic structures (</em><u><em>this is the reason why they are unreactive - the fact)</em></u><em> they would be more stable.</em>

<em />

Therefore, deductive reasoning moves from a wilder reasoning to a specific (narrower) reasoning.

8 0
3 years ago
Help please I really need it. :(
stich3 [128]

Answer:

the second answer

Explanation:

7 0
3 years ago
A solution is prepared by adding 100 ml of 0.2 m hydrochloric acid to 100 ml of 0.4 m sodium formate. is this a buffer solution,
Firdavs [7]
Becoing itsodim fromate t will have  pb of 67

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3 years ago
Give two reasons why quarrying is bad for the enviroment
Elza [17]
Air & noise pollution
Quarry waste
Damage to biodiversity
6 0
2 years ago
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