All categories

3 years ago

How do i know how many neutrons of an element

Chemistry

2 answers:

Alex_Xolod [135]3 years ago

8 0

Answer:

neutrons = atomic mass - atomic number.

hope that helps

alekssr [168]3 years ago

4 0

Answer:

Since the vast majority of an atom's mass is found its protons and neutrons, subtracting the number of protons (i.e. the atomic number) from the atomic mass will give you the calculated number of neutrons in the atom. In our example, this is: 14 (atomic mass) – 6 (number of protons) = 8 (number of neutrons).

You might be interested in

Give the formula for the compound formed when sulfur dioxide reacts with water.

timofeeve [1]

The sulfur dioxide can react with water and produce the sulphurous acid. Sulphurous acid is not steady can decompose to water and SO2. So the formula is SO2+H2O⇔H2SO3.

8 0

4 years ago

Which of these statements about hydrogen bonds is not true?

madreJ [45]

A is false Hydrogen bonds have nothing to do with boiling point

8 0

3 years ago

Read 2 more answers

8. Insecticides are most likely to be damaging when used incorrectly.

iragen [17]

Answer:

True (see detailed explanation).

Explanation:

Hello!

In this case, since insecticides are substances that keep crops from insects that can eat or damage them, it has been acknowledged they are important for the agricultural industry and therefore the citizens sustainability.

However, since insecticides have really complex chemical structures, they are unlikely or sluggishly decomposed by the humans and other animals' cells, which can lead to irreversible genetic damage, cancer and other serious diseases; therefore, when they are used incorrectly, say higher amounts than necessary, spread on crops that are not significantly affected by insects or by any other reason, they are very likely to be damaging for us, animals and in general the environment.

Best regards!

7 0

3 years ago

A cylindrical rod has a length of 27 cm and a diameter of 1.6 mm. What is the cross-sectional area in 10-6 m2?

MrRa [10]

<u>Answer:</u> The cross-sectional area of the cylindrical rod is $2.01\times 10^{-6}m^2$

<u>Explanation:</u>

We are given a cylindrical rod whose cross-sectional area will be in the form of circle.

To calculate the area of circle, we use the equation:

$\text{Area}=\pi r^2$

where,

r = radius of the rod = $\frac{d}{2}=\frac{1.6mm}{2}=0.8mm=0.8\times 10^{-3}m$ (Conversion factor: 1 m = 1000 mm)

Putting values in above equation, we get:

$\text{Area}=3.14\times (0.8\times 10^{-3})^2\\\\\text{Area}=2.01\times 10^{-6}m^2$

Hence, the cross-sectional area of the cylindrical rod is $2.01\times 10^{-6}m^2$

8 0

3 years ago

Part 1. Matching

Lisa [10]

Answer:

Try asking a friend or teacher

Explanation:

helps better than this site because alot of the answers are different even though they might of had the same test

7 0

3 years ago