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Ksenya-84 [330]
3 years ago
11

23. On the periodic table, there are two numbers in the block for the element potassium, K: 19 and 39.098. What are the names of

the numbers and what do they measure?
Chemistry
2 answers:
pshichka [43]3 years ago
5 0
Atomic number (19) measures how many protons it has
mass number (39.098) average of all the isotopes for potassium. as well as the number of protons + neutrons
pishuonlain [190]3 years ago
4 0
<h2>Answer: </h2>

Atomic number and atomic mass respectively.

<h3>Explanation: </h3>
  • The number 19 means the atomic number of K. Atomic number is the number of electrons or protons in an atom.
  • The number 39.098 indicates the atomic mass of the K.
  • Atomic mass is the mass of an atom which is approximately equal to total number of protons and neutrons in the nucleus of K.

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Concerning Boyle's Law, if you had a gas at a pressure of 101 kPa and decreased the volume of the container holding the gas to o
Viefleur [7K]

Answer:

P_2=404 kPa

Explanation:

Hello,

In this case, the Boyle's is mathematically defined via:

P_1V_1=P_2V_2

Which stands for an inversely proportional relationship between volume and pressure, it means the higher the volume the lower the pressure and vice versa. In such a way, since the volume is decreased to one quarter, we can write:

V_2=\frac{1}{4} V_1

We can compute the new pressure:

P_2=\frac{P_1V_1}{V_2} =\frac{P_1V_1}{\frac{1}{4} V_1} =\frac{101kPa*V_1}{\frac{1}{4} V_1} \\\\P_2=4*101kPa\\\\\\P_2=404 kPa

Which means the pressure is increased by a factor of four.

Regards.

7 0
3 years ago
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forsale [732]

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Explanation:

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Answer:

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Explanation:

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If fluorine 20 undergoes beta decay , what will it become ?
e-lub [12.9K]
Fluorine 20 (F - Atomic number 9 and atomic mass 20). Firstly we need to know what is beta decay. Beta decay occurs when one neutron changes into a proton and an electron therefore the atomic mass will remain the same as even though we loose a neutron it is replaced by a proton, the atomic number is always raised by 1 when one beta decay occurs. The produced electron is shot out of the nucleus at an incredible speed. This speedy electron we call a beta particle.

Ok now the reaction.

 20       20        0
F  -> Ne    +     e
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Remember the atomic number determines the nature of the element ( i.e what elemnt it is).
Hope this helps :).
7 0
3 years ago
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