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4 years ago

Which particles that make up an atom are involved in nuclear reactions?

Chemistry

2 answers:

gavmur [86]4 years ago

6 0

The particles that make up an atom AND are involved in nuclear reactions are PROTONS AND NEUTRONS.

elena-s [515]4 years ago

3 0

Your answer is going to be B) Protons & neutrons

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An element's atomic number is 78. How many protons would an atom of this element have?

Oksanka [162]

Answer:

Explanation:

atomic number is number of protons

6 0

4 years ago

How many carbon atoms are present in 3.900 x 10-4 mol of carbon? Give your answer in scientific notation. x 10 (select) A

AnnyKZ [126]

<u>Answer:</u> The number of atoms of carbon present in given number of moles are $2.350\times 10^{20}$

<u>Explanation:</u>

We are given:

Number of moles of carbon = $3.900\times 10^{-4}mol$

According to mole concept:

1 mole of an element contains $6.022\times 10^{23}$ number of atoms.

So, $3.900\times 10^{-4}mol$ of carbon will contain = $3.900\times 10^{-4}\times 6.022\times 10^{23}=2.350\times 10^{20}$ number of atoms.

Hence, the number of atoms of carbon present in given number of moles are $2.350\times 10^{20}$

4 0

3 years ago

Can you describe the situations when Greek prefixes are used?

Black_prince [1.1K]

Answer:

Here's what I get

Explanation:

At the introductory level of chemistry, I can think of only two situations when you use Greek prefixes.

They indicate the number of atoms or groups in a molecule when you are naming a compound.

1. Binary covalent compounds

For example, P₂S₅ is diphosphorus pentasulfide.

2. Hydrates

For example, Na₂SO₄·10H₂O is sodium sulfate decahydrate.

7 0

3 years ago

Cryosurgery uses ________ to remove skin lesions. cold heat chemicals all of these

True [87]

Extreme cold which is usually produced by liquid nitrogen. Hope that helps!

5 0

4 years ago

How many moles of Li would react with 4 moles of MgBr₂ in the reaction

ad-work [718]

Answer:

two may be the answer (2)

3 0

2 years ago