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pychu [463]
2 years ago
12

What is the mass number of an atom with 3 protons, 4 neutrons, and 3 electrons?

Chemistry
2 answers:
RideAnS [48]2 years ago
6 0

Answer:

7

Explanation:

NISA [10]2 years ago
5 0

Answer

<h2>If no of proton is 3</h2><h2 /><h2>Then atomic no. Is3</h2><h2 /><h2>Therefore it is Li</h2><h2 /><h2>Mass no. Of li = 7</h2>

Explanation:

<u>HOPE</u><u> IT</u><u> HELPS</u>

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25 POINTS
Rudiy27

EASY AS PIE AND I LIKE PIE

Calcium iodide (CaI2) is an ionic bond, which means that electrons are transferred.  In order for Ca to become the ion Ca2+, the calcium atom must lose 2 electrons. (Electrons have a negative charge, so when an atom loses 2 electrons, its ion becomes more positive.)  In order for I to become the ion I1−, the iodine atom must gain 1 electron. (When an atom gains an electron, its ion will be more negative.)  However, the formula for calcium iodide is CaI2 - there are 2 iodine ions present. This makes sense because the iodine ion has a charge of -1, so two iodine ions have to be present to cancel out the +2 charge of the calcium ion.  Therefore, the calcium atom transfers 2 valence electrons, one to each iodine atom, to form the ionic bond.

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8 0
3 years ago
Read 2 more answers
A sample of gas occurs 9.0mL at a pressure of 500mmHg. A new volume of the same sample is at 750mmHg. Use two significant figure
Anit [1.1K]

Answer:

V₂ = 6.0 mL

Explanation:

Given data:

Initial volume = 9.0 mL

Initial pressure = 500 mmHg

Final volume = ?

Final pressure = 750 mmHg

Solution:

According to Boyle's Law

P₁V₁ = P₂V₂

V₂ = P₁V₁ / P₂

V₂ = 500 mmHg × 9.0 mL / 750 mmHg

V₂ = 4500 mmHg .mL / 750 mmHg

V₂ = 6.0 mL

5 0
3 years ago
How can graphs be interpreted
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Hope this helps

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7 0
2 years ago
A researcher wants to test the solubility (property of being dissolved) of salt in water as the temperature of the water increas
aev [14]
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3 years ago
Chlorine and oxygen are both gases at room temperature. What are some characteristic properties of chlorine that distinguish it
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Answer:

A soft metal, it's solid. Chlorine and oxygen are both gases at room temperature. What are some characteristic properties of chlorine that distinguish it from oxygen? It dissolves in water.

6 0
2 years ago
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