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Aleksandr-060686 [28]
2 years ago
10

What is the difference between a molecule and a compound?!

Chemistry
2 answers:
Annette [7]2 years ago
8 0
A molecule is when two or more atoms combine together and a compound is at least two different elements.
KiRa [710]2 years ago
3 0

molecules can be made of two of the same elements whereas a compound is always made of two different elements

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Why does the water turn blue after some time when blue ink is dropped in water? Which property
zepelin [54]

Answer:

Particles are constatantly moving and diffusing

This is possible because of diffusion

Explanation:

Hope this helps

7 0
2 years ago
3. 2.15 x 3.1 x 100 =
jeka94

Answer:

666.5

Explanation:

Multiply 2.15 and 3.1 to get 6.665.

6.665×100≈666.5

Multiply 6.665 and 100 to get 666.5.

666.5

3 0
3 years ago
Read 2 more answers
The alkali earth metal beryllium (Be) engages in a chemical reaction and loses all of its valence electrons.
denpristay [2]

The loss of electron from an results in the formation of cation represented by the positive charge on the element whereas gaining of electron results in the formation of anion represented by the negative charge on the element.

The alkali earth metal beryllium (Be) belongs to the second group of the periodic table. The ground state electronic configuration of Be is:1s^{2}2s^{2}

From the electronic configuration it is clear that it has 2 valence electrons in its valence shell (2s^{2}).

After losing all valence electrons that is 2 electrons from 2s orbital. The electronic configuration will be:

1s^{2}2s^{0}

Since, lose of electron is represented by positive charge on the element symbol. So, the beryllium will have +2 charge on its symbol as Be^{2+}.

Hence, beryllium will have 2+ charge on it after losing all its valence electrons in the chemical reaction.

6 0
3 years ago
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Write the formulas for the following compounds: (a) rubidium nitrite, (b) potassium sulfide, (c) sodium hydrogen sulfide, (d) ma
choli [55]

Answer:

All are having different valent cation and anion like mono,di and trivalent polyatomic ions .

A. RbNO3

B. K2S

C. NaHS

D. Mg3(PO4)2 formed by divalent Mg+2 and trivalent PO43-

E. CaHPO4

F. PbCO3 , lead is in Pb+2 form

G. SnF2

H. (NH4)2SO4

I. AgClO4

J. BCl3

6 0
3 years ago
Why are some amino acids described as essential amino acids?
SCORPION-xisa [38]

Answer:

I would say A and D if you can pick two answers. if not then pick D

6 0
3 years ago
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