CHEMISTRY HIGH SCHOOL

Which of the following statements is true? Atoms of isotopes of an element have different numbers of electrons. Atoms of isotopes of an element have different numbers of neutrons. Atoms of the same element all have the same mass. Atoms of isotopes of an element have different numbers of protons.​

Answers

Answer 1
Answer:

Answer:

atoms of isotopes of an element have different numbers of neutrons.

Explanation:

isotopes have the same number of protons, but different numbers of neutrons.

Related Questions

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Balance the following reaction. A coefficient of "1" is understood. Choose option "blank" for the correct answer if the coefficient is "1."Al + HCl → AlCl3 + H2
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Table sugar is not a mineral because?

Which polyatomic ion is found in the compound represented by the formula NaHCO3?(1) acetate (3) hydrogen sulfate
(2) hydrogen carbonate (4) oxalate

Answers

Answer: The correct option is 2.

Explanation: Polyatomic ions are defined as the ions in which two or more elements are covalently bonded to act as a single unit. They always carry some charge.

Examples of polyatomic ions are: OH^- known as hydroxide ion, SO_4^(2-) known as sulfate ion

We are given a compound NaHCO_3 having 2 ions which are Na^+ and HCO_3^-. these ions are named as sodium ions and hydrogen carbonate ions.

Therefore, the correct option is 2.
The correct answer is option 2. Hydrogen carbonate is the polyatomic ion in the compound given. A polyatomic ion is a charged species composed of covalently bonded atoms. Hydrogen carbonate, also known as bicarbonate, is  a polyatomic ion with the charge of -1.

the formula of aluminium sulphide is Al₂S₃. Explain why the formula has a ratio of two aluminium ions for every three sulphide ions.

Answers

Molar mass of Al = 27.0 g/mol
Molar mass of S = 32.1 g/mol
Molar mass of Aluminium sulfide = 27.0 x 2 + 32.1 x 3 = 150.3 g/mol
% of Al (there are 2 Al atoms) in Aluminium sulfide = (54.0)/(150.3) * 100 = 35.9%
% of S (there are 3 S atoms) in Aluminium sulfide = (96.3)/(150.3) * 100 = 64.1%
Assume the percentages to be masses, so:
In 100.0 g of Aluminium sulfide, n (Al) = (35.9)/(27.0) = 1.33 mol
In 100.0 g of Aluminium sulfide, n (S) = (64.1)/(32.1) = 2.00 mol
Convert values to a molar ratio,
1.33 : 2.00
Divide by smallest ratio value,
1 : 1.50
Multiply each ratio value by a factor of 2 to eliminate the decimal,
2 : 3

Hence why the empirical formula of Aluminium sulfide is Al_(2) S_(3)

What is a glass of iced tea containing excess sugar at the bottom said to be?

Answers

The answer is saturated

What are four physical properties of aluminum foil?

Answers

1) solid
2) ductile
3) malleable
4) silver in color

Malleable means that it is "flexible" or can be permanently reshaped easily.  Ductile means that it can be drawn out into a wire.  Aluminum foil's state of matter is solid, and it appears in a silver color.
Solid

Shiny

Dole

Conductor if electricity

While camping up at Haloooo Mountain (5,500 feet above sea level), it generally takes Sandy about the same amount of time to boil water for her soup as it takes to make a sandwich. This week, Sandy is camping at a trail that is only about 200 feet above sea level. Sandy is very hungry and wants something to eat immediately. Should she make the soup or sandwich? Which would be ready more quickly and why?

Answers

She should make soup. When you are way above sea level, the atmospheric pressure decreases. Boiling starts when the vapor pressure of the liquid is the same with the atmospheric pressure. This would mean that water boils at a much lower temperature than the usual 100deg C. So it would take longer for the components in the soup to cook compared to when it is cooked on the foot of the mountain. 

Substances made of two or more elements which are not chemically bonded are known as

Answers

Substances that are not chemically bonded are mixtures.
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