CHEMISTRY HIGH SCHOOL

The smallest part of an element that can still be identified as that element is a(n) _____. (A) molecule
(B) proton
(C) electron
(D) atom

Answers

Answer 1

Answer:

Answer:

atom

Explanation:

(A) molecule is the a group of atoms which are bonded together,

(B) proton it is a particle that comprise an atom

(D) atom is the smallest part of an element that can still be identified

Hence the correct answer is D. The smallest part of an element that can still be identified as that element is an atom.

Answer 2

Answer:

Answer:

(D) atom

Explanation:

The atom is the smallest unit of matter that has the properties of a chemical element.

The atom is composed of protons, electrons, and neutrons, they are subatomic particles.

Each chemical element has an atom that identifies it, but all atoms are composed of subatomic particles, this means that all atoms have electrons, neutrons, and protons.

Depending on the number of subatomic particles that we have is what gives the properties to each atom.

A set of two or more atoms, of one or more elements, form a molecule

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How does the nucleus of a copper atom compared to the nucleus of a nickel atom

Answers

Copper has 29 protons in the nucleus, while Nickel has 28 protons.

What is a free body diagram? what is it used for?

Answers

Answer:

A free body diagram is used to calculate static and dynamic forces acting on an object. In other words, a free body diagram is the starting point to develop a mathematical model to find and calculate various forces acting on a body.

Explanation:

The component which dissolves in a solution is called the.....

Answers

Explanation:

A solution consists of two type of substances. These are solute and solvent.

A solvent is defined as the substance present in lesser amount as compared to a solvent. A solute is able to dissolve in a solvent.

For example, sugar dissolves in water. Here, sugar is the solute and water is the solvent.

Combination of both solute and solvent results in the formation of a solution.

Whereas a solvent is a substance that is present in more quantity as compared to a solute.

Thus, we can conclude that the component which dissolves in a solution is called the solute.

The component which dissolves is called the Solute. It is dissolved by the Solvent.

In the reaction Mg (s) + 2HCl (aq) -> H2 (g) + MgCl2 (aq), how many grams of hydrogen gas will be produced from 300 milliliters of a 4 M HCl in an excess of Mg? Please show all work

Answers

Mg(s) + 2HCl(aq) = H₂(g) + MgCl₂(aq)

v=300 ml=0.3 l
c=4 mol/l

n(HCl)=vc

m(H₂)/M(H₂)=n(HCl)/2

m(H₂)=M(H₂)vc/2

m(H₂)=2.0g/mol·0.3 l · 4mol/l /2 = 1.2 g

1.2 grams of hydrogen gas will be produced

What is the frequency of an event?Group of answer choices

Probability

Degree

Expected occurrence

Identification

Answers

Answer:

Probability

Explanation:

Final answer:

The frequency of an event is a measure of how often the event occurs within a given time period.

Explanation:

The frequency of an eventrefers to how often the event occurs within a given time period. It is a measure of the rate at which the event happens. Frequency can be calculated by dividing the number of times the event occurs by the total time period. Probability, on the other hand, is a measure of the likelihood of an event happening.

For example, if a student attends class 4 days a week, the frequency of attending class is 4/7 or 0.57. Probability, on the other hand, refers to the likelihood of an event occurring. It is a measure of the chances of the event happening. Probability is expressed as a number between 0 and 1, where 0 means the event will not happen and 1 means the event will definitely happen.