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3 years ago

how many protons electrons and neutrons does a atom with the atomic number 50 and mass number 125 contain?

Chemistry

1 answer:

Aleonysh [2.5K]3 years ago

4 0

Answer:

Protons: 50, Neutrons: 75, Electrons: 50

Explanation:

The atomic number, which in this case is 50, determines the number of protons and electrons an atom has. Take the atomic number and subtract the number of protons to get the number of neutrons.

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If an individual proton has mass 1.007825 amu, and an individual neutron has mass 1.008665 amu, what's the calculated mass of a

german

Answer:

C) 237.96682 amu

Explanation:

The symbol for neptunium-236 is given as;

²³⁶₉₃Np

This element has 93 protons and (236 - 93 = 143) neutrons.

Mass Number =Total mass of Protons + Total mass of neutrons

Total Mass pf protons = 93 * 1.007825 amu, = 93.727725 amu

Total mass of Neutrons = 143 * 1.008665 amu = 144.239095 amu

Mass = 144.239095 + 93.727725 = 237.96682 amu

Correct option is option C.

7 0

3 years ago

What is the mass number of an ion with 107 electrons, 158 neutrons, and a 1 charge?

vredina [299]

No of protons=107+1=108
No. Of neutrons=158
Mass no. =166

6 0

4 years ago

A sample of a gas in a rigid cylinder with a movable piston has a volume of 11.2 liters at STP. What is the volume of this gas a

posledela

Given that the volume of cylinder at STP = 11.2 L

Standard temperature = 273 K

Standard pressure = 1 atm

Calculating the volume of gas at 202.6 kPa and 300. K:

Applying the combined gas law,

$\frac{P_{1}V_{1}}{T_{1}} =\frac{P_{2}V_{2}}{T_{2}}$

$P_{1} =1 atm$

$V_{1}=11.2 L$

$T_{1}=273K$

$P_{2}$ = $202.6 kPa*\frac{1 atm}{101.325 kPa} =2 atm$

$V_{2}= ?$

$T_{2}=300. K$

Plugging in the values and calculating final volume:

$\frac{(1atm)(11.2L)}{(273 K)} =\frac{(2atm)(V_{2})}{(300K)}$

$V_{2}=6.15 L$

Therefore the correct answer will be, b) 6.15 L

6 0

3 years ago

What do acids do in solution?

Rasek [7]

Answer:

Explanation:

The increase the [H+] (concentration of H+ ions)

However, they decrease the pH if acids are added to any solution. Since they have more [H+] ions, they increase their conc. in the solution

5 0

4 years ago

This type of nuclear decay "particle has a helium nucleus" in the reaction.

kherson [118]

Believe it’s B alpha decay

3 0

3 years ago