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Makovka662 [10]
3 years ago
9

What are non-metals?explain briefly​

Physics
2 answers:
aliya0001 [1]3 years ago
3 0

Answer:

In chemistry, a nonmetal is a chemical element that is mechanically weak in its most stable form, brittle if solid, and usually gains or shares electrons in chemical reactions. There is no universal agreement on which elements are nonmetals; the numbers generally range from fourteen to twenty-three, depending on the criterion or criteria of interest.

Nitella [24]3 years ago
3 0

Answer:

Non-metals are those which lack all the metallic attributes. They are good insulators of heat and electricity. They are mostly gases and sometimes liquid. Some they are even solid at room temperatures like Carbon, sulphur and phosphorus.

Explanation:

Hydrogen, hydrogen, chlorine, fluorine, carbon, nitrogen, arsenic, phosphorus, selenium are examples of non-metal.

hope i helped

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Why is the nucleus of an atom dense​
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Explanation:

The nucleus of an atom is dense because it contains more of particles in a very little space.

The nucleus is the center of an atom made up of the protons and neutrons.

Atomic nucleus is very small compared to the size of the atom.

 Density is function of mass and volume.

Mass is the amount of matter in a substance.

Volume is the space occupied by a substance.

    The more the mass the more the density.

Since protons and neutron are massive bodies occupying a small space, they make the nucleus very dense.

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7 0
3 years ago
an unknown charge exerts an attractive force of 4.23 E 13 N. If these charges are separated by 8cm, what is the magnitude of the
mash [69]

Answer:

Since there is attraction force between two charges so the other charge must be - 3C

Explanation:

As we know that the force between two charges is given by formula

F = \frac{kq_1q_2}{r^2}

here we know that

F = 4.23 \times 10^{13}N

also we know that

q_1 = 10C

r = 8 cm

now we have

4.23 \times 10^{13} = \frac{(9\times 10^9)(10)q}{0.08^2}

so we have

q = -3C

7 0
3 years ago
As a person pushes a box across a floor, the energy from the person’s moving arm is transferred to the box, and the box and the
san4es73 [151]

Answer:

conserved

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During this process the energy is conserved

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What was the result of the Mexican army's victory over the Texan garrison at the Alamo?
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The fallen defenders became heroes to the cause of Texan independence.

Explanation:

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Neutron is commonly used to initiate a fission chain reaction.
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