# Name and symbol for the first 20 elements.​

2 months ago

Guest #5492752
2 months ago

H - Hydrogen

He - Helium

Li - Lithium

Be - Beryllium

B - Boron

C - Carbon

N - Nitrogen

O - Oxygen

F - Fluorine

Ne - Neon

Na - Sodium

Mg - Magnesium

Al - Aluminum

Si - Silicon

P - Phosphorus

S - Sulfur

Cl - Chlorine

Ar - Argon

K - Potassium

Ca - Calcium

Explanation:

## Solution 2

Guest #5492753
2 months ago

2 Helium He

3      Lithium Li

4 Beryllium Be

5 Boron B

6 Carbon C

7 Nitrogen N

8 Oxygen O

9 Fluorine F

10 Neon Ne

11 Sodium Na

12 Magnesium Mg

13 Aluminum Al

14 Silicon Si

15 Phosphorus P

16 Sulfur S

17 Chlorine Cl

18 Argon Ar

19 Potassium K

20 Calcium Ca

Explanation:

## 📚 Related Questions

Question
If you could count two atoms every second, how long would it take you to count a mole of atoms? Assume that you counted continually 24 hours every day. How does the time you calculated compare with the age of Earth. which is estimated to be 4.5 x 10 years old?​
Solution 1

If we count two atoms every seconds, then the time taken to count one mole of atoms that is 6.02×10²³ atoms is 3.0×10²³ seconds. If we continually count the atoms it will take the time which is longer that the age of earth.

### What is one mole of atoms?

Any substance that contains 6.02×10²³ atoms is called its one mole. this number that is, one mole of an atom is called the Avogadro number.

The time for counting two atoms is one second then the time to count 6.02×10²³ atoms is 6.02×10²³ /2 = 3.0×10²³ seconds.

One year have about 31556926 seconds. 3.0×10²³ seconds comprises 3.0×10²³  /31556926 = 9.53×10¹⁵ years. Age of earth is 4.5 × 10⁹ years.

Therefore, it will take longer time to count one mole of atoms than the age of earth.

brainly.com/question/20350064

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Solution 2

It would take 9.54 x 10^15 years to count 1 mole of atoms which is 10^6 times the age of Earth.

Explanation:

Question
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Solution 1

In thermodynamics, the triple point of a substance is the temperature and pressure at which the three phases of that substance coexist in thermodynamic equilibrium. It is that temperatureand pressure at which the sublimation curve, fusion curve and vaporisation curve meet.

Solution 2

At the triple point, all three phases (solid, liquid, and gas) are in equilibrium. Since the triple point is a point, there is only one temperature and one pressure where the three phases will exist. This fact often helps in identifying compounds or in problem solving.

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Particulate

Explanation:

Ash, dust, pollen, and tiny bits of salt from water are all examples of  particulate

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Solution 2

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Question
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Solution 1
NH3 = water (it is actually a water soluble gas)
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Question
the presidential inauguration is free to watch with or without paying ror traditional tv service. Why is this important?
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so that people would be able to witness the inauguration of a president, since a president is an important part of a country.

Explanation:

Solution 2
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