What can be determined if only the atomic number of an atom is known?(1) the total number of neutrons in the atom, only
(2) the total number of protons in the atom, only
(3) the total number of protons and the total number of neutrons in the atom
(4) the total number of protons and the total number of electrons in the atom

Answers

Answer 1

Answer:

Answer;

(4) the total number of protons and the total number of electrons in the atom

Explanation;

-Atomic number is the number of protons in the nucleus of an atom. An atom is made up of energy shells and the central nucleus. The energy shells contains electrons that are negatively charged while the nucleus contains protons (positively charged) and neutrons (neutral).

-In a neutral atom, the number of protons and electrons are equal, thus the atomic number would indicate the number of electron and protons in an atom. The sum of protons and neutrons on the other hand gives the mass number.

Answer 2

Answer: It is the "(4) the total number of protons and the total number of electrons in the atom" that can be determined if only the atomic number of an atom is known.

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As a Ca atom undergoes oxidation to Ca2+, the number of neutrons in its nucleus(1) decreases
(2) increases
(3) remains the same

Answers

Answer:

Hence the correct answer is remains the same

Explanation:

As a Ca atom undergoes oxidation to Ca2+,as follows:

Ca --- Ca 2+ + 2e-

In the process of oxidation calcium loss 2 electron only there is no change in the number of protons as well neutrons therefore there is no change in the number of neutrons in its nucleus

Hence the correct answer is remains the same

Oxidation:

Oxidation is a process in which either 1 or all following changes occurs:

1. Gaining of oxygen atoms

2. Loss of electrons

3. Loss of hydrogen atom.

4. Increasing oxidation number.

Reduction:

Reduction is a process in which either 1 or all following changes occurs:

1. Loss of oxygen atoms

2. Gaining of electrons

3. Gaining of hydrogen atom.

4. Decreasing oxidation number.

Oxidation refers to a change in electrons (In this case, loss of electrons). It has no impact on the number of neutrons, or for that matter on any sub-atomic particles in the nucleus. So the number of neutrons (3) remains the same

How is it possible for compound to have both ionic and covalent bonds

Answers

And ionic is when a nonmetal and a metal compound bond together and a covalent is when 2 nonmetals bond together
"K2SO4 is an example of a compound that contains both ionic and covalent bonds... the sulfate ion is held together with
covalent bonds... and the potassium ions are ionically bonded to the sulfate ions. Or let's say we have a group of elements that are covalently bonded together, but still have net positive or negative charge... like PO4, OH, SO4, NH4, NO3... and these ions are both cations and anions and can have a plethora of charges.

For example... (NH4)3PO4 can be dissociated but the ions will remain as a group. So when this dissociates... we will get three ammonium and one phosphate ion. But then, the oxygen will not dissociate from the phosphorous any more than the hydrogen will dissociate from the nitrogen."

WHen neither atom attracts or repels the shared electon it can be both.

Which factors affect the flow of electric charge? Check all that apply.voltage
ampere
ohm
resistance
volt

Answers

the answers are voltage and resistance

Answer:

It is Voltage and Resistance

Explanation:

I got it correct on Edg2022 (picture above) ^^

Endorphins are generated in the body during exercise, which leads to better emotional health. Please select the best answer from the choices provided.a. True
b. False

Answers

Answer: Yes the statement is true.

Explanation: Endorphins are chemicals produced by the human bodies to relieve stress and pain.

They are produced mainly by brain and help to transmit electrical signals within nervous system, thus are called as neurotransmitters.

They are also called as "feel good chemicals" as they can act as pain relievers and happiness booster and thus lead to better emotional health.

Endorphins are generated in the body during exercise, which leads to better emotional health. This statement is TRUE.

Further explanation

Endorphins are chemicals produced by the body to relieve stress and pain. This chemical works similarly to a class of drugs called opioid. But because endorphins release naturally by the body it is a safer way to relieve stress and pain.

Exercise boosted mood and powerful depression fighter for several reasons. Through exercise, you are not only gain your physical fitness but it also gives you an enormous sense of well being. You feel more energetic, positive, sleep well and have better memory. Exercise can also serve as a distraction from negative thoughts and activities that feed depression.

Regular exercise is important to maintain a healthy body and mind. The recommended amount and intensity of physical activity varies according to ages and health condition. For an adult, the recommended time is 150 minutes per week for a moderate-intensity activity or 75 minutes per week for vigorous-intensity activity, or a combination of these two activities. You can break this into 25 minutes a day for 3 days a week.

Learn more

Aerobic exercise and endorphins brainly.com/question/4349107

Endorphins brainly.com/question/890846

Regular exercise brainly.com/question/3122325

Keywords: endorphins, regular exercises, stress, and anxiety reliever

The enthalpy of a system is the same as its:A. specific heat.
B. heat of reaction.
C. heat of combustion.
D. heat content.

Answers

The answer for above statement:

D. heat content.

Explanation:

Enthalpy is a measure of the total energy of a thermodynamic system. It includes the internal energy, which is the energy required to create a system, and the amount of energy required to make room for it by displacing its environment and establishing its volume and pressure.

Heat content - (thermodynamics) a physical science amount adequate the interior energy of a system and the merchandise of its volume and pressure.

Ans D) heat content

Enthalpy (H) is a thermodynamic state function which according to the first law of thermodynamics is a sum of internal energy (E) and the pressure- volume (PV) work.

i.e. H = E + PV

Thus, enthalpy is the total heat content of a system which includes contributions from both kinetic and potential energy.

Hypobromite is used to purify contaminated water. what is the formula for hypobromite