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rodikova [14]
4 years ago
7

What does ''Isotope'' means? &from which language that drives from? answer to me then you will have 20 points help me then y

ou will get help​
Chemistry
1 answer:
coldgirl [10]4 years ago
3 0

Isotopes are variants of a particular chemical element which differ in neutron number, and consequently in nucleon number. All isotopes of a given element have the same number of protons but different numbers of neutrons in each atom.

The term isotope is formed from the Greek roots isos ("equal") and topos ("place"), meaning "the same place".

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Galina-37 [17]

Answer:

Option C

Explanation:

Litmus paper shows only whether the solution is acidic or basic, but not how strong it is.

=> Base turns the red litmus paper blue

=> Acid turns the blue litmus paper red.

5 0
3 years ago
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Does lithium lose or gain electrons
harkovskaia [24]

Answer:

Lithium loses one electron to become an Ion.

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A 100.0-g sample of water at 27.0oC is poured into a 71.0-g sample of water at 89.0oC. What will be the final temperature of the
Sedbober [7]

<u>Answer:</u> The final temperature will be 52.74^oC

<u>Explanation:</u>

Calculating the heat released or absorbed for the process:

q=m\times C\times (T_2-T_1)

In a system, the total amount of heat released is equal to the total amount of heat absorbed.

q_1=-q_2

OR

m_1\times C\times (T_f-T_1)=-m_2\times C\times (T_f-T_2) ......(1)

where,

C = heat capacity of water = 4.184J/g^oC

m_1 = mass of water of sample 1 = 100.0 g

m_2 = mass of water of sample 2 = 71.0 g

T_f = final temperature of the system = ?

T_1 = initial temperature of water of sample 1 = 27^oC

T_2 = initial temperature of the water of sample 2 = 89.0^oC

Putting values in equation 1, we get:

100.0\times 4.184\times (T_f-27)=-71.0\times 4.184\times (T_f-89)\\\\171T_f=9019\\\\T_f=\frac{9019}{171}=52.74^oC

Hence, the final temperature will be 52.74^oC

6 0
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lions [1.4K]

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false

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A fluorine element has 7 valence electrons.

A stable fluorine ion should have 8 valence electrons.

So fluorine gains an extra electron.

Thus, the most stable monatomic ion is F^{-}

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