3 years ago

What is the periodic table and why is it neccessary?

1 answer:

6 0

Answer:

The periodic table is a table displaying each element and information about the elements, for example atomic number and chemical properties. This is necessary because without it it would be very hard to find information on the elements.

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Please help! you’ll be marked brainliest

Trava [24]

Answer:

Number of Protons:

Co: 27

Cl: 17

K: 19

S: 16

Al: 13

P: 15

Number of Electrons:

Co: 25

Cl: 18

K: 18

S: 18

Al: 10

P: 18

4 0

3 years ago

Which example is nonpoint-source pollution?

lesantik [10]

First off, what is nonpoint-source pollution?

It comes from many sources BUT this type of pollution doesn't come from factories discharging their waster, nor sewage pipes, nor smokestack emissions; but rather it comes from rainfall or snow-melt moving through and over the ground. Taking away natural and human-made pollutants.

This being said, the answer, is A. Polluted Rainwater.

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4 years ago

The melting point of table salt is 801 degrees C. Is this a physical or chemical property?

wolverine [178]

Melting point is a physical property

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3 years ago

Read 2 more answers

The dimensions of a box are 4.5 cm wide by 5.750 cm long by 1.50 cm tall. What is the volume of the box , taking significant fig

FromTheMoon [43]

Answer:

38.8125