CHEMISTRY HIGH SCHOOL

The characteristic temperature at which a pure solid changes to a liquid is its ______ point.

Answers

Answer 1

Answer: it is known as the melting point

Answer 2

Answer:

Answer:

freezing

Explanation:

Related Questions

A substance that is present in a reaction but not used up in the reaction is called a _____.
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Define mechanical energy

Answers

Mechanical energy is the sum of potential energy and kinetic energy.

is the sum of potential energy and kinetic energy.

Based on atomicity , how molecules are categorized

Answers

Answer:

On the basis of atomicity, molecules can be classified as : Monoatomic-composed of 1 atom e.g. He, Ne, Ar (all noble gases are monoatomic) Diatomic-composed of 2 atoms e.g. H2 , N2 , O. Triatomic-composed of 3 atoms e.g. O

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What occurs when an atom loses an electron?(1) The atom’s radius decreases and the atom becomes a negative ion.
(2) The atom’s radius decreases and the atom becomes a positive ion.
(3) The atom’s radius increases and the atom becomes a negative ion.
(4) The atom’s radius increases and the atom becomes a positive ion.

Answers

When an atom loses an electron, it becomes a positive ion and the radius of the atom decreases. The correct answer is option 2.

An atom is the basic unit of matter that consists of a nucleus, which contains positively charged protons and uncharged neutrons, surrounded by a cloud of negatively charged electrons.

The valence shell determines the size of the atom, and when an electron is removed from this shell, the size of the atom decreases. The loss of an electron from an atom creates a positively charged ion, called a cation.
The cation has a smaller radius than the neutral atom because the positive charge on the cation attracts the remaining electrons more strongly, pulling them closer to the nucleus.

Therefore, option 2. The atom’s radius decreases, and the atom becomes a positive ion is the correct answer.

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Answer:

When an atom loses an electron, the atom's radius decreases and the atom becomes a positive ion.

A compound is formed when 171.2 g of carbon reacts with 28.8 g of hydrogen. What is the mass percent of hydrogen in the compound

Answers

Following the law of conservation of mass, the mass percent of hydrogen in the resulting compound is 14.4%(wt/wt). This is assuming that all of the carbon reacts with all of the hydrogen. The solution is as follows:

mass % = mass hydrogen*100/total mass = 28.8*100/(28.8+171.2) = 14.4%

Answer:

For Edmentum/Plato users, the correct answer is A. 14.4%

Use the periodic table to identify the element represented by each of the following electron configurations. [He]2s2: ?

Answers

Answer:

Be. Beryllium

Explanation:

The Suns ultraviolent Rays can cause skin damage including sunburn and even skin

Answers

yes , because UV rays are super harmful , the reason why you'd apply sun screen . The UV rays are blocked by the ozone layer , except when there is too much of global warming.

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In 3 to 5 sentences identify the type of bonding the would form between potassium and chlorine use a electronegativitynegativity to justify the bond type provide a chemical formula for resulting compound