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3 years ago

What are the three isotopes of hydrogen and what is the significance of these isotopes?

Chemistry

2 answers:

antiseptic1488 [7]3 years ago

4 0

Answer:

21H deuterium (D), 31H is tritium (T), 11H is hydrogen

Explanation:

11H: it has the greatest abundance, it has only one proton (it does not have neutrons).

21H (D): it has a proton and a neutron in its nucleus.

31H (T): it has a proton and two neutrons in its nucleus.

Remember that isotopes have the same atomic number, but a different mass number (elements in the number of neutrons differed).

snow_lady [41]3 years ago

3 0

Answer:

See below.

Explanation:

They are Hydrogen 1 , Hydrogen 2 (also called deuterium) and Hydrogen 3 (tritium)

Hydrogen has no neutrons in the nucleus while deuterium has 1 and tritium has 2.

Deuterium has been used in the nuclear industry ( as heavy water , deuterium oxide) and as a compound lithium deuteride in the H bomb. Tritium is also used as a fuel in nuclear fusion reactions, and as a radioactive tracer.

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- 5. Describe the general trend in atomic radil across a row of the periodic table.

sattari [20]

Answer:

Across a row, atomic radii decreases.

Explanation:

It decreases because nuclear charge increases across a row, electrons are added to the same shell and shielding remains constant. Therefore the outer electrons are more attracted to the nucleus making the atom smaller.

8 0

2 years ago

A pupil adds 5 cm of 12 mol.dm sulphuric acids to make a 250 cmº solution. Calculate the

klemol [59]

Answer:

0.500 mol/dm³

Explanation:

Using the formula below;

CaVa = CbVb

Where;

Ca = concentration of acid (mol/dm³)

Cb = concentration of base (mol/dm³)

Va = volume of acid (cm³)

Vb = volume of base (cm³)

In accordance to the information provided in this question is;

Va = 5cm³

Vb = 250 cm³

Ca = 12 mol/dm³

Cb = ?

Using CaVa = CbVb

12 × 5 = Cb × 250

60 = 120Cb

Cb = 60/120

Cb = 0.500 mol/dm³

8 0

3 years ago

If salt is dissolved in water, water serves as the:

NemiM [27]

B. solvent

solute is the substance being dissolved

5 0

3 years ago

An atom of which of these elements most likely forms an anion? A. AI B. Br C. Ca D. Mg

Papessa [141]

The answer is B. A good way determine this is how far right the element is on the periodic table. The further right the element is, the more electronegative it is meaning it is more willing to accept an electron. This can be explained using the valence electrons and how many need to be added or removed to complete the octet. The further right you are, the easier it is for the element to just gain a few electrons instead of loose a bunch. Noble gases are the exception to this since they don't normally react though.

4 0

3 years ago

Read 2 more answers

Consider the reaction pathway graph below.

Alex17521 [72]

Hello!

The reaction that the graph represents is A. Exothermic because Hrxn=-167 kJ

To calculate Hrxn we apply the following equation:

$Hrxn=Hproducts-Hreagents=-625kJ-(-458kJ)=-167kJ$

Looking at the graph, and at the result of the calculations, we can see that the enthalpy of the products is lower than the enthalpy of the reagents, because the sign is negative. That means that the reaction releases energy in the form of heat and that the reaction is exothermic.

Have a nice day!

6 0

3 years ago