CHEMISTRY HIGH SCHOOL

To show the electron configuration for an atom, when would it be better to use an orbital notation than to use a written configuration with numbers, letters, and superscripts? when the aim is to show orbital shapes in subshells
when the aim is to show electron distributions in shells

Answers

Answer 1
Answer: The answer is: when the aim is to show electron distributions in shells

An orbital notation is more appropriate if you want to show how the electrons of an atom are distributed in each subshell. This is because there are some atoms that have special electronic configurations that aren't obvious in just written configurations.
Answer 2
Answer:

Answer:

d

Explanation:

on edg 2020

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Uncontrolled hypertension can lead toA. heart attack.
B. stroke.
C. kidney damage.
D. all of the above.

Answers

All of the above,this can lead to stokes, heart attacks and kidney damage.
Hypertension puts pressure on the blood vessel walls which can damage them, the vessels in your heart, brain and other organs can be damaged by uncontrolled hypertension.

Compounds are formed when the atoms of two or more elements are chemically combined.What type of bond is formed if atoms donate electrons to other atoms when the elements are combined?

A. ionic bond
B. hydrogen bond
C. covalent bond

Answers

Fully donating an electron results in an ionic bond, so A is the correct answer.

In comparison, B, a hydrogen bond, is a bond that forms between an H in one compound and an O, N, or F in another.  It is among the strongest of intermolecular forces, while ionic/covalent bonds are intramolecular.

C, a covalent bond, is a bond that forms when atoms share electrons instead of donating them.

When a nonmetal bonds with a nonmetal, they form a(n) _______________

Answers

they form a covalent bond

What is the formula of the ion formed when potassium achieves noble-gas electron configuration

Answers

Answer;

K+

Explanation;

-Noble gas configuration is the electron configuration equivalent to noble gases or group 8 elements. According to the octet rule an atom of an element gains or looses electrons to attain noble gases configuration which is the stable configuration, such that an atom has attained maximum number of electrons in the outermost energy level.

-For instance potassium is an alkali metal, consisting of one valence electron in the outermost energy level. For an atom of potassium to attain octet configuration or noble gases configuration it will have to loose one electron, thus forming a positively charged ion of potassium, K+.
potassium is an alkali metal which means that it only needs to get rid of one electron to achieve a noble gas configuration.  Since it only needs to get rid of one electron the ion will be a cation with a charge of +1 which means the symbol will be K⁺.

I hope this helps.  Let me know if anything is unclear.

What net ionic equation describes the reaction when these solutions are mixed?Given the equation: Na3PO4 (aq) + CaCl2(aq) →


A. 2PO43–(aq) + Cl– (aq) → Cl2(PO4)3(s)
B. 2Ca2+(aq) + Na+(aq) → NaCa2(s)
C. Na+(aq) + Cl– (aq) → NaCl(s)
D. 2PO43–(aq) + 3Ca2+(aq) → Ca3(PO4)2(s)

Answers

I think the correct answer from the choices listed above is option D. The net ionic equation that will describe the reaction of the reactants when mixed is expressed as:

2PO43–(aq) + 3Ca2+(aq) → Ca3(PO4)2(s)

Hope this answers the question. Have a nice day.

Answer:

2PO_(4)^(-3) (aq) + 3Ca^(+2)(aq)-->Ca_(3)(PO_(4))_(2)(s)

Explanation:

In net ionic equation we remove the spectator ions. The ions which are present on both the side and are not forming any solid compound.

Let us write the balanced reaction first:

2Na_(3)PO_(4)(aq)+3CaCl_(2)(aq)-->3Ca_(3)(PO_(4))_(2)+6NaCl(aq)

The ionic reaction is:

6Na^(+)(aq)++6Cl^(-)(aq)+2PO_(4)^(-3) (aq) + 3Ca^(+2)(aq)-->Ca_(3)(PO_(4))_(2)(s)+6Na^(+)(aq)+6Cl^(-)(aq)

Thus net ionic reaction is

2PO_(4)^(-3) (aq) + 3Ca^(+2)(aq)-->Ca_(3)(PO_(4))_(2)(s)

Which state of matter has a definite volume but can change its shape?A.) Solid
B.)gas
C.)liquid

Answers

Answer:

solid

Explanation:

because solid has a definite shape and volume

Answer:

Liquid

Explanation:

This is because the intermolecular forces of attraction are strong enough to hold the molecules together but not so strong as to fix them into definite positions (as in solids). Instead, they possess fluidity and hence no definite shape.
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