Which atom has the largest atomic radius?(1) potassium (3) francium
(2) rubidium (4) cesium

Answers

Answer 1

Answer:

Answer is: 3) francium.

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.

Potassium (K), rubidium (Rb), ceasium (Cs) and francium (Fr) are in group 1 (the alkali metals) of the periodic tabl.

The atomic radius increases down the group of Periodic table and francium is on the bottom of the group 1 with highest atomic number.

Answer 2

Answer:

Final answer:

The atom with the largest atomic radius among potassium, rubidium, cesium, and francium is francium, due to it being furthest down the group of alkali metals.

Explanation:

The atomic radius increases as we move down a group on the periodic table. This is because the number of energy levels increases, which causes the electron cloud to expand. Hence, in this case, the largest atomic radius would belong to francium, as it is the furthest down the group of alkali metals (which includes potassium, rubidium, and cesium).

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A balloon with a volume of 1.50 L is compressed to a volume of 0.50 L (at a constant temperature).a. Do you expect the pressure of the gas in the balloon to increase or decrease? Why?

Answers

The pressure of the gas in the balloon is expected to decrease.

WHAT IS BOYLE'S LAW?

Boyle's law states that the volume of a given gas is inversely proportional to the pressure of the gas provided the temperature is constant.

Boyle's law is denoted by the equation: K = P/V.

This means that as the volume of the gas increases, the pressure decreases and vice versa.

Therefore, the pressure of the gas in the balloon is expected to decrease.

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Answer : The pressure of gas in the balloon will be increases.

Explanation :

Boyle's Law : It is defined as the pressure of the gas is inversely proportional to the volume of the gas at constant temperature and number of moles.

$P\propto (1)/(V)$

From this we conclude that, as the volume of gas increases then the pressure of the gas will be decreases and as the volume of gas decreases then the pressure of the gas will be increases.

As per question, the volume of balloon decreases from 1.50 L to 0.50 L at constant temperature. So, the pressure of gas in the balloon will be increases.

Hnece, the pressure of gas in the balloon will be increases.

Which of the following lists contain only elements?A. air, iron, iodine, magnesium.
B. zinc, gold, aluminium, oxygen.
C. nitrogen, copper, mercury, water.
D. Chlorine, argon, sodium, limestone.

Answers

A list that contains only element is option B which include zinc, gold, aluminum, and oxygen.

What is a Chemical element?

A chemical element may be defined as a type of simple substance that significantly cannot be broken down or fragmented into smaller parts or changed into another substance.

The basic part of an element is an atom, which contains subatomic particles like protons, neutrons, and electrons. All atoms of an element have the same number of protons. In list A, the air is not an element, in list C, water is not an element, in list D, limestone is not an element. While list B includes all elements like zinc, gold, aluminum, and oxygen.

Therefore, a list that contains only elements is option B which includes zinc, gold, aluminum, and oxygen.

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In which elements are belonging to? I will grant that option B ; ti's the best answer.
In which thou might contain the elements zinc , gold , aluminium , and last by not least oxygen.

I truly hope ti's answer helps thou.

Which factor causes gas and dust to pull together during the first stage of star formation?

Answers

Answer:

B. Gravity on E2020

Gravity pulls gas and dust together. A protostar forms as mass increases.

What type of mixture contains the largest particles

Answers

A suspension is the mixture with the largest particles.

A gas is 90.82L at 29.8 atm and 99.9°C. What volume would the gas be at standard temperature and pressure.

Answers

Answer:

1981.38L

Explanation:

P=29.8atm;

T=273+99.9=372.9⁰K

V=90.82L

P₀=1atm

T₀=273⁰K

V₀-?

PV/T=P₀V₀/T₀

V₀=PVT₀/P₀T=

$= (29.8 * 90.82 * 273)/(1 * 372.9) = 1981.38l$

Which statement describes one acid-base theory?(1) An acid is an H+ acceptor, and a base is an H+ donor.

(2) An acid is an H+ donor,. and a base is an H+ acceptor.

(3) An acid is an H- acceptor, and a base is an H-donor.

(4) An acid is an H- donor, and a base is an H acceptor.

Answers

The answer is an acid is an H+ donor and a base is a H+ acceptor. This is in accordance to the Lewis definition of acids, which states that an acid is any substance that is able to release H+ ions in a solution or one that is able to accept a pair of nonbonding electrons. Another example of an acid-base theory is the Bronsted-Lowry theory of acids and bases.

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1Which is a dopant for a p-type semiconductor?arsenicindiumphosphorusantimony2Which statement is true for both types of transistors?Current flows from the collector to the emitter.Current flows from the base to the emitter.The base is between the collector and the emitter.The base is a p-type semiconductor.3 Which explains whether boron or arsenic is the dopant most likely used in the semiconductor layer marked with +?This layer is the controller of an NPN transistor, so it could include boron.This layer is the emitter of an NPN transistor, so it could include arsenic.This layer is the controller of a PNP transistor, so it could include arsenic.This layer is the emitter of a PNP transistor, so it could include boron.4 What can a transistor do in order to fulfill its function in a circuit? Check all that apply.control which layer is the emittercontrol its own semiconductancechange the dopants in the transistor act like an insulatoract like a conductor5Which lists the layers in a PNP transistor from the least negative to the most negative?emitter, base, collectorbase, emitter, collectorcollector, base, emittercollector, emitter, base6Roland writes a story in which boaters become stranded on a sandy island. In the story, they set about collecting materials to create semiconductors to repair computer components in their radio.Which problem is likely to be the most difficult for Roland’s characters to overcome?There are no semiconductor elements on the island.Any substances they find are too impure.They lack materials to make a p-type semiconductor.No conductors are available to connect the components.

Two objects attract each other with a gravitational force of 25 newtons from a given distance. If the distance between the two objects is reduced by a factor of 5, what is the changed force of attraction between them?