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horrorfan [7]
3 years ago
9

How should the table be changed to correctly distinguish between mechanical and electromagnetic waves?

Chemistry
2 answers:
shepuryov [24]3 years ago
5 0

Answer:

Sound waves and light waves need to change places.

Explanation:

cluponka [151]3 years ago
4 0

Answer:

D

Explanation:

Sound waves and light waves need to change places.

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Salt has a chemical formula of NaCI. Is salt a pure substance or mixture? Explain.
algol [13]
Salt is a mixture,salt is composed of sodium and chlorine,NaCI.Its a compound of two distinct elements that can not be broken down further without changing the properties of the substance.(I hoped that helped)
3 0
3 years ago
1) Why are the antimony and beryllium ions so small? Differentiate between the causes.
Viefleur [7K]
1. For this question, the adjective small must be percepted in a relative sense. This is because it is not the smallest ion (that would be hydrogen). It could be that the antimony and beryllium ions are smaller compared to their neutral forms. This is because they donate electrons when ionized. As a result, the electrons are reduced, so does the electron cloud which makes the radius much smaller.

2. The periodic table is arranged in terms of increasing atomic number. For neutral atoms, the number of protons (atomic number) is equal to the number of electrons. So, the farther we go down the table, the higher the atomic number. The higher the atomic number, the bigger the electron cloud which makes the atomic radius bigger. Because by definition, atomic radius is the length from the nucleus to the farthest electron from the nucleus.
4 0
3 years ago
Read 2 more answers
Which of the following best describes an atom?
Tanzania [10]

Answer: The smallest unit of matter.

Explanation:

7 0
4 years ago
___Fe2O3 + ___C --> ___Fe + ___ C03 balanced
SashulF [63]

Answer:

Fe2O3 + C → 2Fe + CO3

Explanation:

The unbalanced equation given in this question is as follows:

Fe2O3 + C → Fe + C03

To balance this equation, one should ensure that the number of atoms of each element on both sides of the equation is equal. The balanced equation is as follows;

Fe2O3 + C → 2Fe + CO3

N.B, there are;

- 2atoms of Fe on both sides

- 1 atom of C on both sides

- 3 moles of O on both sides

5 0
3 years ago
How can a mixture of salt and sand be seperated
melisa1 [442]

Answer:

filtration

Explanation:

1.put the mixture in a beaker

2.add water to the beaker and stir to dissolve salt

3.filter using a filter paper to have sand as the residue

4.Evaporate the water to remain with salt crystals

7 0
4 years ago
Read 2 more answers
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