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3 years ago

To find the number of neutrons in an atom, subtract its _____.

Chemistry

2 answers:

SpyIntel [72]3 years ago

8 0

Explanation:

It is known that an atom consists of protons, neutrons and electrons. Both protons and neutrons are located inside the nucleus of an atom whereas electrons revolve around the nucleus.

Atomic number is the total number of protons present in an atom. On the other hand, atomic mass is the sum of total number of protons and neutrons present in an atom.

That is, Atomic mass = no. of protons + no. of neutrons

no. of neutrons = atomic mass - no. of protons

Therefore, we can conclude that to find the number of neutrons in an atom, subtract its number of protons from atomic mass.

Komok [63]3 years ago

6 0

Subtract it's atomic number from it's mass number

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24. As the first five elements in Group 14 are considered in order from top to bottom, there are changes

myrzilka [38]

Answer:

Explanation:

As you move down the periodic table in the carbon family, the atomic radius and ionic radius increase while electronegativity and ionization energy decrease. Atom size increases moving down the group because an additional electron shell is added.

8 0

2 years ago

Helium decays to form lithium. Which equation correctly describes this decay?

GrogVix [38]

Answer:

⁴He₂ → ⁴Li₃ + ⁰e₋₁.

Explanation:

Helium decays with the release of an electron to form a lithium nucleus.

The number of nucleons is the same on both sides of the equation.

A neutron decays to form a proton with the release of an electron.

The atomic number increases from 2 to 3 while the atomic mass number stays the same at 4 nucleons.

8 0

3 years ago

Read 2 more answers

- How many moles of S2 are needed to produce 1.50 moles of SO2 gas? S2 + 20, ----> 2802

matrenka [14]

Answer:

0.75 moles

Explanation:

S2 + 2O2 = 2SO2

From the reaction above,

We see that number of moles attached to S2 is 1 and number of moles attached to SO2 is 2.

Since we want to find how many moles of S2 are needed to produce 1.50 moles of SO2 gas

The answer is gotten by proportion;

Number of moles = 1/2 × 1.5 = 0.75 moles

3 0

2 years ago

Answer this for 100 points.

lukranit [14]

Answer:

A I think

Explanation:

4 0

2 years ago

Read 2 more answers

PLEASE HELP ME, 20 POINTS

Marrrta [24]

Explanations:

Question 1: Lithium in 20.00+ g is C. or D., but 25.00+ g is D. which means this is the correct option.

I am unsure of Question 2. I don't think it is mole though.

Question 3: Boron in 25.00-30.00 g is B. or D., but 25.00 g would be C.

Question 4: 2.393 x 1024 atoms of Oxygen is 63.58 mole O. I don't know for sure, but I think this is correct.

I am NOT professional. There is a chance I am incorrect. Please reply to me if I've made a mistake.

4 0

2 years ago