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Nataliya [291]
4 years ago
15

Each chemical element has an atomic number and a mass number. the atomic number refers to the number of ___________________the e

lement has, while the mass number refers to the number of ________________ the element has.
Chemistry
1 answer:
creativ13 [48]4 years ago
5 0
The atomic number tells us the number of protons and electrons.
The atomic mass tells us the weight of the nucleus, which is the amount of protons and neutrons
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two students are working together to build a birdhouse. Student 1 applies a force of 10 N to a wooden board in order to slide it
Ganezh [65]

Answer:

6

Explanation:

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i hope this helps you! :)

5 0
3 years ago
Why is it that the north star is the only star in the night sky that seems to stay still
Masja [62]

I think it is because it is directly about the north or south pole (I forget) so while all the other stars seem to rotate around because the Earth is rotating but the North Star is directly in the center. Don't take my word though.

8 0
4 years ago
1.As with any grid, the periodic table has ________ (left to right) and __________ (up and down).
Inga [223]

Answer:

  1. rows and columns
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6 0
3 years ago
Question 25 a chemist determined by measurements that 0.020 moles of mercury participated in a chemical reaction. calculate the
sammy [17]
To solve this question, we first need to know the mass of one mole of mercury. This can be done by checking the periodic table.

From the periodic table, we can see that:
molar mass of mercury = 200.59 grams/mole.

From the measurements, the chemist found that the participated amount of mercury is 0.02 moles.

We can simply determine the mass of 0.02 moles by doing cross multiplication as follows:
mass of 0.02 moles = (0.02 x 200.59) / 1 = 4.0118 grams

Rounding the answer to 2 significant digits, we get:
mass of 0.02 moles = 4.01 grams
4 0
3 years ago
Convert 73.7L to KL *
Mariulka [41]
0.737 KL would be the answer, pls give brainliest.
7 0
3 years ago
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