CHEMISTRY HIGH SCHOOL

Which pair below describes isotopes of the same element? A) an atom with 6 protons and 8 neutrons - an atom with 8 protons and 6 neutrons
B) an atom with 6 protons and 6 neutrons - an atom with 6 protons and 7 neutrons
C) an atom with 8 protons and 8 neutrons - an atom with 7 protons and 8 neutrons
D) an atom with 7 protons and 6 neutrons - an atom with 6 protons and 6 neutrons

Answers

Answer 1

Answer:

Answer: The correct answer is Option B.

Explanation:

Isotope is defined as the chemical specie which belong to the same element but differ in their molecular mass.

The isotopes have same atomic mass but differ in their mass numbers

Atomic number is defined as the number of protons or electrons that are present in a neutral atom.

Atomic number = number of protons = number of electrons

Mass number is defined as the sum of number of protons and neutrons that are present in an atom.

Mass number = Number of protons + Number of neutrons

Thus, isotopes of an element has same number of protons but they differ in the number of neutrons.

For Example: Chlorine has 2 isotopes, $_(17)^(35)\textrm{Cl}\text{ and }_(17)^(37)\textrm{Cl}$

In $_(17)^(35)\textrm{Cl}$ isotope:

Number of protons = 17

Number of neutrons = 35 - 17 = 18

In $_(17)^(37)\textrm{Cl}$ isotope:

Number of protons = 17

Number of neutrons = 37 - 17 = 20

Hence, the correct answer is Option B.

Answer 2

Answer: B because isotopes have the same number of protons but a different number of neutrons

Related Questions

Under which conditions of temperature and pressure would a 1-liter sample of a real gas behave most like an ideal gas?(1) 100 K and 0.1 atm (2) 100 K and 10 atm (3) 500 K and 0.1 atm (4) 500 K and 10 atm
Given the boiling point of water which is 81 degrees Celsius, calculate the atmospheric pressure.
Explain how molecular size plays a role in the strength of intermolecular forces.
The solution set of axequalsb is the set of all vectors of the form wequalspplusbold v subscript h, where bold v subscript h is any solution of the equation axequals0.
A white solid is flammable and dissolves in hexane. Would you expect this compound to be organic or inorganic?

Primaries, the secret ballot, and the use ofreferendum and recall were efforts made during
the Progressive Era to
(1) preserve the power of political machines
(2) provide equal political rights for Native
American Indians
(3) protect States rights against federal power
(4) increase citizen participation in government

Answers

(4) Increase citizen participation in government

Primary: a way for citizens to vote for new government officials, not too influenced by party leaders
Secret Ballot: keeping a voter's votes private from others
Recall: a way for citizens to remove a government official from office
Referendum: a way for citizens to vote for or against something proposed by the legislature

During the Progressive Era, many local governments were lead by corrupt political machines. They would rig elections in their favor as well as threaten those who voted against them. Many would appoint their supporters who weren't usually qualified to government positions as incentive to vote for them (I don't know if you care but that's called the spoils system).

It's not (1) because the whole point of primaries, secret ballots, recalls, and referendums was so political machines were not dominating
It's not (2) because none of this has a lot to do with Native Americans
It's not (3) because the political machines were a local government problem, not federal
It IS (4) because by getting more people involved in the government, they can elect qualified officials, vote on laws that best benefit the people, and minimize corruption.

How many grams of acetylene react if 1.10 mil of CO2 are produced

Answers

the combustion reaction of acetylene has a balanced equation
C2H2+3O2--->2H2O+2CO2
Using the ratio 1:3:2:2, if 1.10 mols of CO2 are produced, assuming complete combustion, than that means that 0.55 mols of acetylene (C2H2) must have been combusted. The molar mass of acetylene is 26, so the answer is 26*0.55 = 14.3 grams

Metallic bonding occurs between atoms of(1) sulfur (3) fluorine(2) copper (4) carbon

Answers

As u see, copper is the only metal in the options. Therefore, metallic bonding occurs between atoms of copper.

**98 POINTS** Given 1.00 gram of (NH4)2 CO3, how many grams of this sample would be due to hydrogen?

Answers

OP already did it - CONGRATS!!

here are the steps 2 get the same ans:

(NH4)2 CO3 has 2x N, 8x H, 1x C and 3x O per molecule

so its molecular mass = 2x14 + 8x1 + 1x12 + 3x16

=28+8+12+48

=96g

of that 96g, 8x1=8g is due to Hydrogen

so by ratio n proportion, 1.00g will have 1x8/96 = 1/12g = 0.083g of H

10 Which statement correctly describes the location and charge of the electrons in an atom?F The electrons are inside the nucleus and have no charge.
G The electrons are outside the nucleus and have no charge.
H The electrons are inside the nucleus and have a negative charge.
The electrons are outside the nucleus and have a negative charge.

which is correct

Answers

Answer:

D. The electrons are outside the nucleus and have a negative charge.

Explanation:

Electrons are located outside the nucleus while protons and neutrons are located inside the nucleus.

Electrons are negatively charged and attracted to nucleus as the nucleus carry protons that are positively charged and neutrons have no charge.

Electrons are arranged in different energy levels based on the attraction between the positively charged nucleus and negatively charged electron.

Hence, the correct answer is "D. The electrons are outside the nucleus and have a negative charge."

Use the following table to answer the question. Strong acids Weak acids Weak bases Strong bases HBr CH3COOH NH3 NaOH HCl HF NH4OH KOH H2SO4 HCN Cu(OH)2 Ca(OH)2 Which of these salts has the highest pH? K2SO4 Cu2SO4 NH4Cl NaCH3COO

Answers

Answer: D. NaCH3COO

Explanation:

Let's go through each of these salts and think about the reactions behind them. Keep in mind that the salt with the highest pH is the most basic.

(The underlined atoms can match the chemical formula for the salt. By matching the atoms, we can reason which bases and which acids reacted to produce a given salt.)

A. K2SO4

Using the table, we can assume that this salt was produced by with the reactants of the strong baseKOH and the strong acid H2SO4
A strong base and strong acid react to produce a more neutral salt, so this is likely the incorrect answer

B. Cu2SO4

Using the table, we can assume that this salt was produced by with the reactants of the weak baseCu(OH)2 and the strong acid H2SO4
A weak base and strong acid react to produce a more acidic salt, so this is likely the incorrect answer

C. NH4Cl

Using the table, we can assume that this salt was produced by with the reactants of the weak baseNH4OH and the strong acid HCl
A weak base and strong acid react to produce a more acidic salt, so this is likely the incorrect answer

D. NaCH3COO

Using the table, we can assume that this salt was produced by with the reactants of the strong baseNaOH and the weak acidCH3COOH
A strong base and weak acid react to produce a more basic salt, so this is likely the CORRECT answer

Final answer:

Sodium acetate (NaCH3COO) has the highest pH among the given salts because it is derived from a strong base and a weak acid, resulting in a basic solution upon dissolution in water.

Explanation:

The question asks which salt among K2SO4, CuSO4, NH4Cl, and NaCH3COO has the highest pH. To determine this, we consider the acidic or basic nature of the ions in each compound.

Sodium acetate (NaCH3COO) is formed from sodium hydroxide (NaOH), a strong base, and acetic acid (CH3COOH), a weak acid. When this salt dissolves in water, it produces Na+ ions and CH3COO- ions. The acetate ion can react with water to produce a small amount of OH- (hydroxide ions), causing the solution to be basic.

Ammonium chloride (NH4Cl) is derived from the weak base ammonia (NH3) and hydrochloric acid (HCl), a strong acid. This salt in solution will lower the pH due to the production of H+ ions from NH4+.

Potassium sulfate (K2SO4) and Copper(II) sulfate (CuSO4) are salts of sulfuric acid (H2SO4), a strong acid, and strong bases (KOH and Cu(OH)2 respectively). Since both strong acids and strong bases completely dissociate, the resulting salts typically do not affect the pH significantly.

Of these, NaCH3COO will have the highest pH because it creates a basic solution when dissolved in water.

Learn more about Determination of Highest pH Salt here:

brainly.com/question/35355887

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