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Maru [420]
3 years ago
10

What items are minerals or contain minerals

Chemistry
1 answer:
NARA [144]3 years ago
7 0

Answer:

computer

Explanation:

copper-wire

electronics-siliver

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The electronic structures of atoms X and Y are shown.
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Answer:

Its formula is B) XY3,also known as ammonia,because X is hydrogen and Y is nitrogen.

So,yeah the answer is B

Pls mark me as brainliest

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Individual atoms of each element all have an equal number of protons and neutrons. Only the number of electrons may vary. t or f
Anit [1.1K]

Proton and Neutron numbers within an atom cannot change, however, the electron number may change and form an ion. The answer is True

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Describe the molecular structure of water and explain why the water molecule is polar
pentagon [3]

Explanation:

Hybridization of O in H_2O = sp^3

So, water molecule has four hybrid orbitals.

Two hybrid orbitals form 2 sigma bond with two H atoms.

Remaining two hybrid orbitals are occupied by two lone pairs.

Because of lone pair-lone pair repulsion, shape of H_2O becomes bent.

Water molecule is polar because of difference in eletronegativities of O and H.

O is more electronegative as comapared to hydrogen. So bonding electrons get attracted towards O atom which results in the development of partial negative charge on O atom and partial positive charge on H atoms.

Because of development of partial negative and partial positive charge, water molecule becomes polar.

8 0
3 years ago
What should you be careful of when measuring the temperature of a liquid in a beaker
andrezito [222]

The precaution to be taken while measuring the temperature of a liquid in a beaker is applying proper heat balance and taking all the required precautions.

  • A beaker with an open top contains a sample of liquid. It exposes this sample to light.
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  • Since it is well known that the surface temperature of a liquid, along with air movement above the liquid surface, is one of the dominant factors affecting evaporation, I want to measure the evaporation rate as a function of surface temperature.
  • This can be done by applying a heat balance.

Learn more about heat balance at:

brainly.com/question/1292905

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What occurs in a chemical reaction?
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B - The reactants are the starting substances and the products are the end substances.
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