As atomic number increases within Group 15 on the Periodic Table, atomic radius(1) decreases, only
(2) increases, only
(3) decreases, then increases
(4) increases, then decreases

Answers

Answer 1

Answer:

Answer is: (2) increases, only.

The atomic radius of a chemical element is a measure of the size of its atom.

The atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

Nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), bismuth (Bi) and moscovium (Mc) are in group 15 of Periodic table. They have same number of valence electrons (five).

Nitrogen has smallest atomic number and smallest atomic radius.

Answer 2

Answer:

As atomic number increases within group 15, the atomic radius ; ( 2 )

Increases only

In the periodic table, the size of the atomic radius will continue to change as the the atomic number of the elements increase. Elements in the same group have the same/similar number of valence electron counts and also similar vacancy counts as well.

Therefore as you go down the group, the atomic number of the elements in the same group increases and in response to that the distance between the nucleus and the outermost shell will also increase ( which is the atomic radius ).

Hence we can conclude that As atomic number increases within group 15,the atomic radius Increases only .

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The rate constant (k) for the decay of the radioactive isotope I-131 is 3.6 x 10-3 hours 1. The slope of which of the following graphs is correct for the decay and could be used to confirm the value of k?

The alkali metals are

Answers

Answer:

They are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).

Hope this helps :)

Answer:

Groups one of the periodic table.

Lithium Li

Sodium Na

Potassium K

Rubidium Rb

Cesium Cs

Francium Fr

which of the following is an arrhenius base? a brønsted-lowry base? a lewis base? it is possible for a base to be of more than one type.

Answers

Final answer:

An Arrhenius base produces hydroxide ions (–OH) when dissolved in water. A Brønsted-Lowry base can accept a proton (H+) from another substance. A Lewis base donates a pair of electrons to form a coordinate covalent bond.

Explanation:

An Arrhenius base is a substance that produces hydroxide ions (–OH) when dissolved in water. An example of an Arrhenius base is sodium hydroxide (NaOH), which dissociates in water to form Na+ and OH– ions.

A Brønsted-Lowry base is a substance that can accept a proton (H+) from another substance. Ammonia (NH3) is an example of a Brønsted-Lowry base as it can accept a proton to form its conjugate acid, ammonium (NH4+).

A Lewis base is a substance that donates a pair of electrons to form a coordinate covalent bond. An example of a Lewis base is ammonia (NH3), which donates a pair of electrons to a Lewis acid to form a Lewis acid-base complex.

It is possible for a base to be of more than one type. For example, ammonia (NH3) is both a Brønsted-Lowry base and a Lewis base.

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Final answer:

An Arrhenius base is a substance that increases the concentration of OH- in water. A Brønsted-Lowry base is a substance that can accept a hydrogen ion. A Lewis base can donate an electron pair. It is possible for a base to be classified as more than one type.

Explanation:

An Arrhenius base is defined as a substance that increases the concentration of hydroxide ions (OH-) when dissolved in water. Sodium hydroxide (NaOH) is an example of an Arrhenius base as it dissociates in water to form a sodium ion (Na+) and a hydroxide ion (OH-).

A Brønsted-Lowry base, on the other hand, is any substance that can accept a proton (a hydrogen ion). Ammonia (NH3) is a common example of a Brønsted-Lowry base. When it reacts with water, it accepts a proton from a water molecule, forming its conjugate acid, ammonium (NH4+).

Last but not least, a Lewis base is a substance that can donate an electron pair. For example, ammonia (NH3) can act as a Lewis base as it donates its lone pair of electrons to form a coordinate covalent bond.

Yes, it is possible for a base to be categorized as both an Arrhenius, Brønsted-Lowry, and Lewis base - water (H2O) is one such example.

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Given the equation: 2Na + 2H2O → 2NaOH + H2 Which substance in this equation is a binary compound?

Answers

Answer: In the following equation, $H_2O$ is considered as a binary compound.

Explanation: A binary compound is considered as a compound having 2 elements only. In the following chemical equation:

$2Na+2H_2O\rightarrow 2NaOH+H_2$

There are 2 compounds present because compound is defined as the chemical combination of two or more elements in a fixed ratio.

In the equation, compounds are: $H_2O$ and $NaOH$

$H_2O$ consists of 2 elements which are hydrogen and oxygen and hence is considered as a binary compound.

$NaOH$ consists of 3 elements which are sodium, hydrogen and oxygen and hence, cannot be considered as a binary compound.

Which element is a solid at STP?
A. H2
B. I2
C. N2
D. O2

Answers

An element which is solid at STP that is standard temperature and pressure is iodine.

What is an element?

An element is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.Elements combine to form compounds.

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B. I2, di-Iodine, is solid at STP.

1,000convert in to scientific notation

Answers

1*10^3
It’s easier to think of it this way- the number of zeros will be the exponent

Answer: 1 x $10^3$

Explanation: You can see that the only non-zero digit is 1, so it is 1 x $10^x$ 1,000 has 3 zeroes to the left of the period, so it is1x $10^3$ . Quite simple!

A change of phase never accompanies a. a change in volume b. a change in pressure
c. a change in temperature
d. a change in density
e. a change in structure