Biology, 13.11.2019 00:31 stephensandrew4293

Why does the atomic model keep changing?

2. what subatomic particles of an atom are in the nucleus?

3. where are the electrons located?

4. draw an atomic model below. it should contain 4 levels with full shells.

5. how many valence electrons does iron (fe) have? how do you know?

Answers: 3

Show answers

Answers

Answer from: fruitbutt77

Answer no 1:

Models can be described as ideas which are predicted by scientists based on their findings. With new advancements and researches in science, they keep changing over time.

The ancient Greeks believed that an atom cannot change or cannot be broken.But as advancements were made in the scientific field, sub atomic particles were discovered. Hence, the atomic model will keep changing whenever new better models will be proposed.

Answer No 2:

There are two subatomic particles which are present in the nucleus:

Neutrons: Neutons can be described as sub atomic particles which have a neutral charge.Protons: Protons can be described as sub atomic particles which have a positive charge.

Answer No 3:

Electrons can be described as the sub atomic particles carrying a negative charge. They are not present inside the nucleus of an atom like protons and neutrons. Electrons are smaller than protons and neutrons.

Electrons are present outside of the nucleus, in shells or orbits that surround the nucleus.

Answer No 4:

The atomic model to be drawn shall be of Iron (Fe). Iron has 26 electrons.

An atom of electron will have 2 electrons in its outer shell. 8 in the second shell, 14 in the third shell and two in the last shell.

Answer No 5:

The number of electrons present in the outermost shell of an atom make the valence electrons. The outermost shell of electron has 2 electrons, hence the number of valence electrons will be 2 for an iron atom (Fe).

Answer from: Quest

telophase and anaphase

Answer from: Quest

carbohydrates: (starches and sugars) composed of carbon, hydrogen, and oxygen.

lipids: (fats, oils, and waxes) are made of carbon and hydrogen atoms.

nucleic acids: contain hydrogen, oxygen, nitrogen, carbon, and phosphorus. they are polymers of nucleotides. a nucleotide has three parts, a 5-carbon sugar, a phosphate (-po⬇️4) group, and a nitrogenous base.

proteins: made up of nitrogen, carbon, hydrogen, and oxygen. they are polymers of amino acids.

Another question on Biology

Biology, 21.06.2019 16:30

Describe how an electric generator works

Answers: 2

Answer

Biology, 21.06.2019 21:20

Indicate whether the following statements about the biases in the fossil record are true or false. a) inland species are more likely to be preserved than marine species b) organisms with hard body parts are more likely to be preserved than are those composed soft tissues. c) species that existed over a larger area are more likely to be preserved than species existing over a smaller area. d) organisms that lived very long ago are more likely to be found as fossils than organisms that lived relatively recently e) the fossils of larger organisms are more likely to be found than the fossils of smaller organisms

Answers: 2

Answer

Biology, 21.06.2019 23:30

Mutations associated with albinism affect proteins involved in synthesis

Answers: 1

Answer

Biology, 22.06.2019 00:10

Which muscle is responsible for inhalation ?

Answers: 2

Answer

You know the right answer?

Why does the atomic model keep changing?

2. what subatomic particles of an atom are in...