A substance that contains only one kind of matter is known as a(n)A. atom.
B. element.
C. molecule.
D. compound.

Answers

Answer 1

Answer:

Answer: B. element.

Explanation:

An atom is the smallest unit of any matter which may or may not have independent existence.

Element is a pure substance which is composed of atoms of similar elements.It can not be decomposed into simpler constituents using chemical reactions.Example: Copper $(Cu)$

Molecule is the smallest unit of any matter which always have independent existence.

Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.It can be decomposed into simpler constituents using chemical reactions. Example: water $CO_2$

Answer 2

Answer: Elements are composed of only one type of atom, so element is the term you need

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Name the two sub-atomic particles in the nucleus of an aluminium atom.

Answers

The two sub-atomic particles present in the nucleus of an aluminum (Al) atom are: proton and neutrons.

Protons: Positively charged protons are present in the atom's nucleus. They have an approximate relative mass of 1 atomic mass unit (amu), a relative charge of 1, and a relative mass of 1.

Neutrons: The nucleus of an atom contains neutrons, which are neutral particles. They have a relative mass of roughly 1 atomic mass unit (amu) and no electric charge (their charge is zero).

The number of protons in an aluminum atom determines its atomic number, which is 13, and the number of neutrons can vary, resulting in various aluminum isotopes with various masses. Aluminum-27, which has a nucleus made up of 13 protons and 14 neutrons, is the most prevalent isotope of the metal.

To know more about protons:

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The sub-atomic particles inside the nucleus of atoms of any element are protons and neutrons. Protons have a positive charge and neutrons are neutral with no charge.

What is one benefit associated with a nuclear fission reaction?(1) The products are not radioactive.
(2) Stable isotopes are used as reactants.
(3) There is no chance of biological exposure.
(4) A large amount of energy is produced.

Answers

The correct answer is (4) A large amount of energy is produced in a nuclear fission reaction.
Choice (1) is false, the products are radioactive, and often have to be buried underground for long periods of time. Choice (2) is false, because the reactants are often unstable to allow them to decay and release energy. Choice (3) is false, because the radioactive substances can affect living organisms.

"A large amount of energy is produced" is by far the most associated with a nuclear fission reaction in terms of a benefit, in terms of making both power and bombs.

What is atomic mass measured in on the periodic table?

Answers

the atomic mass of an element, is measured in amu

How much 0.05 M HCl solution can be made by diluting 250 mL of 10 M HCl?

Answers

if,
10M:250ml
0.05M:Xml
10X=0.05×250
10X=12.5
X=1.25ml
Hope this helps*wink*

All of the following need to be present for a plant to do photosynthesis except light

water

oxygen

carbon dioxide

Answers

Oxygen is a by-product of photosynthesis thus it is not needed for photosynthesis to occur.

Light is needed to provide the energy needed as photosynthesis is endothermic and is also needed to ionise the water molecule to get hydroxide and hydrogen ions and carbon dioxide is what is reduced to starch.

Which of the following does not describe natural migration?
Pls I really need help