CHEMISTRY HIGH SCHOOL

which of the following are closely related to the electron configuration of an element? A. Atomic Number B. Molecular Weight C. Chemical Reactivity D. Valence Electrons

Answers

Answer 1
Answer:

Answer:

NO:  A and B

YES:  C and D

Explanation:

A. Atomic Number         No.  This is the number of protons in the nucleus.

B. Molecular Weight      No. Protons + Neutrons

C. Chemical Reactivity   Yes.  The electron configuration allows prediction of reactivity with other elements.

D. Valence Electrons     Yes.  The most active electrons is bonding.

Related Questions

Which expression represents a reaction rate?a. time/massc. energy/timeb. number/timed. time/energy
It's important to match your exercise shoes with the type of exercise in which you will be participating.
Water changing from a liquid to a gas is _____.precipitationevaporationcondensationtranspiration
A solute is a mixture in which particles can be seen and easily separated. Please select the best answer from the choices provided T F
A nuclear fission reaction and a nuclear fusion reaction are similar because both reactions(1) form heavy nuclides from light nuclides(2) form light nuclides from heavy nuclides(3) release a large amount of energy(4) absorb a large amount of energy

10) which of the following compounds is a saturated hydrocarbon? A) CH3CH2OH B) CH CH C) ethyne CO CH3CHO 1) which compound is an unsaturated hydrocarbon? CA hexane B) hexanoic acid henne D) ethane. D) CH CH

Answers

The compound that is a saturated hydrocarbon is CH3CH2OH. The answer is letter A. A saturated hydrocarbon has only one single bond between the carbon atoms. The compound that is an unsaturated hydrocarbon is CHCH. The answer is letter D.

Some isotopes of elements are unstable and decay into other, more stable isotopes over time. for example, it takes 153 years for half of a sample of silicon (si) atoms with 14 protons, 14 electrons, and 18 neutrons to decay. what is the name of this specific silicon isotope.a. silicon-14
b. silicon-32
c. silicon-46
d. silicon-153

Answers

The correct answer is option a, silicon-14

Number of electrons = 14

Number of protons = 14

Number of neutrons = 18

Since atomic number is equal to the number of protons, the atomic number of this specific silicon isotope is 14.

Also, mass number is equal to number of protons and number of neutrons. So mass number so this specific silicon isotope is 14 + 18 = 32

The name of this specific silicon isotope is silicon-14.

Silicon-14 is represented as ³²Si₁₄

How many moles of h2o are produced when 3.25 moles of o2 react in 2c2h6 + 7o2 ---> 4co2 + 6h2o

Answers

Answer:

2.78 moles of water are produced.

Explanation:

Given data:

Number of moles of H₂O produced = ?

Number of moles of oxygen react = 3.25 mol

Solution:

Chemical equation:

2C₂H₆ + 7O₂       →     4CO₂ + 6H₂O

Now we will compare the moles of water with oxygen.

                O₂          :          H₂O

                 7            :           6

               3.25        :           6/7×3.25 = 2.78 mol

A sample of water is heated from 10.0 degrees Celcius to 15.0 degrees Celcius by the addition of 125 Joules of heat. What is the mass of the water?

Answers

Answer:

125 = 5*4.186*m

m = 125 / 5*4.186 = 5.97g of water.

Explanation:

The water is increased by 5 degrees. This means that for every gram of water, it takes 5*4.186 J to increase the temperature by 5 degrees, aka 5*4.186 J/g

hope this help:)

What did Thomson’s model of the atom include that Dalton’s model did not have?

Answers

Thomson's model included Protons and Electrons. His model is referred to as 'Plum Pudding' because of it.

Answer: subatomic particles: negative charges (electrons) distributed in a mass of positive charge.

Explanation:

1) John Dalton's model depicted the matter as the combination of tiny, indivisible particles, called atoms.

According to this model, atoms can not be created, destroyed, or divided into smaller particles.

2) When it was discovered that all forms of matter contained negative particles, by multiple experiments with cathode ray tubes, those particles where named electrons.

3) J.J. Thompson could determine that the mass of those negative charges was much smaller that the mass of the smallest atom (hydrogen). Concluding that existed smaller particles than the atom. Hence, Dalton's model was wrong: atoms was divisible into smaller subatomic particles.

4) Then J.J Thompson proposed the plum pudding model, in which the electrons (plums) are embeded into a uniform positive mass (pudding).

How does the reaction affect oxygen atoms?

Answers

In the oxygen structure, all electrons are paired, thus, making oxygen dimagnetic. But actual experiments have shown that oxygen has paramagnetic properties. They are attracted to magnets. 

The oxygen atoms react according to the kind of reaction it undergoes. Mostly, O2 is present in combustion reactions. For example, combustion of carbon:

C + O2 ---> CO2
Other Questions
The pH is a solution remains constant in the presence of a buffer if acid or base is added beyond the buffer capacity. True or false.
Given the equation representing a system at equilibrium:N2(g) + 3H2(g)<==>2NH3(g) + energyWhich changes occur when the temperature of this system is decreased? (1) The concentration of H2(g) increases and the concentration of N2(g) increases. (2) The concentration of H2(g) decreases and the concentration of N2(g) increases. (3) The concentration of H2(g) decreases and the concentration of NH3(g) decreases. (4) The concentration of H2(g) decreases and the concentration of NH3(g) increases.
Describe the main diffrence between the bohr model of the atom and the rutherford model
Sexual reproduction A. helped maintain a slow rate of evolutionary change.B. limited the material in which natural selection can act upon.C. increased genetic variation.D. maintained the same gene combinations over time.