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Debora [2.8K]
3 years ago
5

How do i describe endothermic and exothermic changes in matter?

Chemistry
1 answer:
Usimov [2.4K]3 years ago
5 0
I hope this helps you with your problem !!!!!

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Water flows from areas of low land to areas of high land ture or false
Viktor [21]

Answer:

false

Explanation:

water flows from areas of high land to low land

due to the pull of gravity

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3 years ago
Name one solid that can be used in place of candle wax while will give the same result​
Nataliya [291]

Answer:

Paraffin Wax

Explanation:

Paraffin wax is one of the most widely used waxes for candle making. A cheaper alternative, it is a derivable from petroleum, coal or oil. This wax is white and odorless and will keep a consistent appearance throughout your candle's life.

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4 years ago
Did you ever rediscover something of yours that you<br> had forgotten? How did you react?
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8 0
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What are the two functional group present in the molecule
dedylja [7]

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carboxyl group (COOH) and amines

Explanation:

3 0
3 years ago
what is the electrons, valence electrons, and electron shells number please answer all 3 questions (look at the picture)
MariettaO [177]

In picture one, there are four electrons, one valance electrons and two shells, in image two there are three electrons, one valance electrons and two shells whereas there are 13 electrons, three valance electrons and three shells.

<h3>What is Electrons, Valence Electrons, and Electron Shells Numbers?</h3>

<u>Electrons</u>:

An electron is a negatively charged particle which can be either bounded with to an atom. Electrons belong to the first generation of the lepton particle family, and are generally thought to be elementary particles because they have no known components or substructure.

<u>Valence Electrons:</u>

Valence electrons are those electrons which are present in outermost shell or in valence shell or energy level of an atom. For example, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell.

<u>Electron Shells Numbers</u>:

Each shell can contain only a fixed number of electrons: the first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on.

So we can conclude that In picture one, there are four electrons, one valance electrons and two shells, in image two there are three electrons, one valance electrons and two shells whereas there are 13 electrons, three valance electrons and three shells.

Learn more about Valence Electrons here: brainly.com/question/371590

#SPJ1

4 0
1 year ago
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