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AleksAgata [21]
3 years ago
15

What Is Matter? Someone help me plzzz

Chemistry
1 answer:
adelina 88 [10]3 years ago
3 0

Answer:

matter is anything with mass and volume

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List first thirty elements with their valences​
lbvjy [14]

Element   Atomic Number Valency

Valency of Hydrogen 1 1

Valency of Helium 2 0

Valency of Lithium 3 1

Valency of Beryllium 4 2

Valency of Boron 5 3

Valency of Carbon 6 4

Valency of Nitrogen 7 3

Valency of Oxygen 8 2

Valency of Fluorine 9 1

Valency of Neon 10 0

Valency of Sodium (Na) 11 1

Valency of Magnesium (Mg) 12 2

Valency of Aluminium 13 3

Valency of Silicon 14 4

Valency of Phosphorus 15 3

Valency of Sulphur 16 2

Valency of Chlorine 17 1

Valency of Argon 18 0

Valency of Potassium (K) 19 1

Valency of Calcium 20 2

Valency of Scandium 21 3

Valency of Titanium 22 4

Valency of Vanadium 23 5,4

Valency of Chromium 24 2

Valency of Manganese 25 7, 4, 2

Valency of Iron (Fe) 26 2, 3

Valency of Cobalt 27 3, 2

Valency of Nickel 28 2

Valency of Copper (Cu) 29 2, 1

Valency of Zinc 30 2

5 0
3 years ago
Experiments were carried out in which a beam of cathode rays was first bent by a magnetic field and then bent back by an electro
Sergio039 [100]

a. the ratio of mass to charge of an electron

Explanation:

The experiment permitted the direct measurement of the ratio of mass to charge of an electron.

  • The charge to mass ratio of an electron was determine by accelerating a beam of cathode rays in magnetic and electric fields.
  • No matter the gas used in the tube or the nature of the material of the electrodes, the rays were found to have constant charge to mass ratio of 1.76 x 10¹¹coulombkg⁻¹.

learn more:

Subatomic particles brainly.com/question/2757829

#learnwithBrainly

6 0
3 years ago
Which describes Ernest Rutherford’s experiment?
inna [77]

The best description of Ernest Rutherford's experiment is letter C. The positively charged particles were fired through a gold foil. Most of these particles went right through, while others bounced back. This experiment led to the discovery of the nucleus.

7 0
3 years ago
Read 2 more answers
In order to change the mass of a compound to number of miles, what is needed?
Svet_ta [14]
I am in fire / ems class does anyone know anything about firefighting please answer this question thanks

What are the five fire department notifications systems chapter 37 fire detection suppression and protection systems
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3 years ago
5. A plane starting from rest is accelerated to its takeoff velocity of 75 m/s during a 5
LuckyWell [14K]

Answer:

answer is 14

Explanation:

A= v-u/t

A = 75 - 0/5

A = 14

v = final velocity

U = initial velocity

T = time taken

8 0
2 years ago
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