CHEMISTRY MIDDLE SCHOOL

I need an answer asap How do scientists determine the number of neutrons in an isotope of an atom?

They subtract the number of protons from the mass number.

They subtract the number of electrons from the mass number.

They subtract the number of protons and neutrons from the mass number.

They add the number of protons and electrons.

Answers

Answer 1

Answer:

Scientists can calculate the number of neutrons by subtracting the atomic number from the atomic mass.

they subtract the protons

Answer 2

Answer:

Final answer:

The number of neutrons in an isotope of an atom is calculated by subtracting the number of protons from the mass number.

Explanation:

Scientists determine the number of neutrons in an isotope of an atom by subtracting the number of protons from the mass number of the atom. This is because the mass number of an atom is determined by the sum of its protons and neutrons. Therefore, once you know the total mass number and the number of protons, you can easily calculate the number of neutrons by performing a simple subtraction. For example, if an atom has a mass number of 23 and has 11 protons, it would have 12 neutrons (23-11=12).

Learn more about neutrons in isotopes here:

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Carbon burns with oxygen to produce carbon dioxide gas. Which of these shows the correct chemical reaction?A) CO2 = C + O B) C + O = CO2 C) C+ O -> CO2 D) C, O, CO2
Write number then solution!!!!!!!!!!!

Which one could be the answer

Answers

b would be my answer

If a base is added to water, what will occur?hydronium ion concentration is increased.
hydroxide ion concentration is decreased.
[H+] is decreased.
[OH-] is decreased.

Answers

Answer:

[H+] is decreased.

Explanation:

Arrhenius Theory:

An acid is a substance which produces one or more hydrogen ions, (H+) in aqueous solution.

Examples:

$HCl(aq)>H^+(aq)+Cl^-(aq)\n\nHBr(aq)>H^+(aq)+Br^- (aq)\n\nH_2 SO_4(aq)>2H^+(aq)+SO_4^2- (aq)\n\nH_3 PO_4(aq) >3H^+ (aq)+PO_4^3-(aq)\n\nCH_3 COOH(aq)>CH_3 COO^- (aq)+H^+ (aq)$

A Base is a substance which produces one or more hydroxyl ion or hydroxide ion (OH-) in aqueous solution.

Examples

$NaOH(s)>Na^+ (aq) + OH^- (aq)\n\nKOH(s)>K^+ (aq) +OH^- (aq)\n\nCa(OH)_2 (s)>Ca^(2+) (aq)+2OH^-(aq)\n\nAl(OH)_3 (s)> Al^(3+)(aq)+ 3OH^- (aq)$

Please note:

(aq) stands for aqueous which means in the presence of water that is, water acts as a solvent

So, on adding a base to the water increase in $[OH^-]$ will take place and this will decrease the Hydrogen ion concentration

Pure water contains $[H^+]=[OH^-]$

if the solution is acidic $[H^+ ]>[OH^- ]$

if the solution is Basic $[H^+ ]<[OH^- ]$

Answer:

Explanation:

The first and most obvious statement is that [OH-] is increased, but that is not offered to you.

The second most obvious statement is that the [H+] ion is decreased. That is offered to you. It is C

What does jupiter and saturn have in common and what do they don't

Answers

they are both gas giants and have rings. but unlike Saturn's rings being made of ice and is visible Jupiter's rings are dark and hard to see. they are also made of tiny rock and dust.

they both have a gaseous surface, raging storms, rings, lots of moons, and are very large planets.

According to ale Chateliers principle what a change is introduced into a system in chemical equilibrium the equilibrium shifts

Answers

Your answer is C in the direction that relieves the change

That is the definition of Le chatelierts principle.

HOPE THIS HELPS

What are examples of electrical energy

Answers

Electrical energy is made up of negative and positive particles. Lightning, lamp, TV, computer.

lamp
television because u need electric to work them

What is the name given to the property of metal that allows electricity to pass through.

Answers

That would be "conductivity". All substances have some measurable amount it, but metals have by far the most.

What is the name given to the property of metal that allows electricity to pass through ?

Answer : conductivity

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