All categories

3 years ago

If atoms are made of smaller parts such as electrons, why are atoms considered the basic unit of matter?

Chemistry

2 answers:

Shtirlitz [24]3 years ago

6 0

Explanation:

Atoms are considered as the basic unit of matter because atoms combine to form matter. Atoms combine to form elements and compounds which further make up the atom.

Atoms contain electron, proton and neutrons. Electrons are negatively charged particles. They do not combine to form matter. A stable atom is a combination of fixed number of electrons, protons and neutrons.

klemol [59]3 years ago

3 0

Atoms are considered the basic unit of matter because it is atoms that make up the elements which in turn combine to form compounds that exist in all states. It is true that atoms are made up of electrons and neutrons and protons, but they are not useful on their own individual level. Like, you don't hear anyone say that "the particles that make up atoms are the basic unit of matter".

You might be interested in

The ka of phosphoric acid, h3po4, is 7.6  10–3 at 25 °c. for the reaction h3po4(aq) h2po4 – (aq) + h+ (aq) ∆h° = –14.2 kj/mol.

blsea [12.9K]

<span>Use the van't Hoff equation: ln ( K2 K1 ) = Î” HÂş R ( 1 T1 â’ 1 T2 ) ln ( K2 7.6*10^-3 ) = -14,200 J 8.314 ( 1 298 â’ 1 333 ) ln ( K2 7.6*10^-3 ) = â’ 1708 ( 0.00035 ) ln ( K2 0.0076 ) = â’ 0.598 Apply log rule a = log b b a -0.598 = ln ( e â’ 0.598 ) = ln ( 1 e 0.598 ) Multiply both sides with e^0.598 K 2 e 0.598 = 0.0076 K e 0.598 e 0.598 = 0.0076 e 0.598 K 2 = 0.0076 e 0.598 = 4.2 â‹… 10 â’ 3 K2 = 4.2 â‹… 10 â’ 3</span>

7 0

3 years ago

How many bacteria can fit into an animal cell

melisa1 [442]

The size of most eukaryotic animal cells range from 1 - 30 micrometers while the size of, let's say coccus bacteria is between 0.5 - 1.0 micrometers. So, if the largest animal cell is filled with the largest coccus bacteria, we can say that 30 bacteria can fit inside.

5 0

4 years ago

Which element from the periodic table has four valence electrons

Ivahew [28]

carbon has 4 valence electrons

6 0

3 years ago

Read 2 more answers

What is <br>the answer <br>please tell me

kupik [55]

Answer:

A HBr

this is hydrogen acid (HBr) but KNO3 is a crystalline salt,MgCl2 and H2O are neutral

5 0

4 years ago

study the diagram and answer the following questions. a. Name A and B. b. Which element is it? Write its name and B symbol. p*=

Oksana_A [137]

Ai. A is called nucleus

Aii. B is called electron shell

B. The name of the element is Neon and the symbol of the element is Ne.

Ci. The atomic mass of the element is 20.

Cii. The atomic number of the element is 10

Di. The element belongs to group 18.

Dii. The element belongs to period 2.

E. The element has a valency of 8

A. Determination of the name of A and B

In the diagram given above, A is called the nucleus because it contains the neutrons and the protons of the atom.

B is called the electron shell because it contains the electrons of the atoms

B. Determination of the name and symbol of the element.

From the diagram given above,

The element has 10 protons. This simply means that the atomic number of the element is 10.

Comparing the atomic number of the element with those in the periodic table, the element is Neon with a symbol of Ne.

C. Determination of the atomic mass and atomic number.

Ci. Determination of the mass number

Proton = 10

Neutron = 10

<h3>Mass number =?</h3>

Mass number = Proton + Neutron

Mass number = 10 + 10

<h3>Mass number = 20</h3>

Thus, the atomic mass of the element is 20.

Cii. Determination of the atomic number.

The atomic number of an element is simply the number of protons in the atom of the element.

Proton = 10

Therefore,

Atomic number = proton = 10

Thus, the atomic number of the element is 10

D. Determination of the group and period.

Di. The group to which an element belongs to can be obtained by simply calculating the number of electrons in the outermost shell of the atom.

From the diagram given above, the outermost shell has 8 electrons. This suggest that the element has completely filled outermost shell.

Therefore, the element belongs to group 18 (i.e the noble gas)

Dii. The number of electron shell talks about the period to which and element belongs to.

From the diagram given above, the element has 2 electron shells.

Therefore, the element belongs to period 2

E. Determination of the valence electron(s)

The valence electron(s) is the number of electrons in the outermost shell of the atom.

From the diagram given above,

The outermost shell has 8 electrons.

Therefore, the element has 8 valence electrons

Learn more: brainly.com/question/5352570

3 0

2 years ago