At STP, which list of elements contains a solid, a liquid, and a gas?(1) Hf, Hg, He (3) Ba, Br2, B
(2) Cr, Cl2, C (4) Se, Sn, Sr

Answers

Answer 1

Answer:

Periodic table contain element of various states like solid, liquid and gases. Thus the that list of elements contains a solid, a liquid, and a gas is HF, Hg, He. Hence option A is correct option.

What is periodic table?

Periodic table is a table in which we find elements with properties like metals, non metals, and metalloids

STP means standard temperature and pressure where temperature is 273.15 K and pressure is 1 bar. It is known that only bromine (Br) and mercury (Hg) are in liquid form at STP. Whereas noble gases like He, Ne, Ar are gases in nature.

HF - solid, Hg - liquid, and He - gas

Ba - solid, - liquid, and B - solid

Cr - solid, - gas, and C - solid

Se - solid, Sn - solid, and Sr - solid

Thus, we can conclude that list of elements contains a solid, a liquid, and a gas is HF, Hg, He. Hence option A is correct option

Learn more about periodic table, here:

brainly.com/question/11155928

#SPJ5

Answer 2

Answer:

Answer: Option (1) is the correct answer.

Explanation:

STP means standard temperature and pressure where temperature is 273.15 K and pressure is 1 bar or 0.98 atm.

It is known that only bromine (Br) and mercury (Hg) are in liquid form at STP. Whereas noble gases like He, Ne, Ar etc are gases in nature.

Hence, given elements are differentiated as follows.

HF - solid, Hg - liquid, and He - gas

Ba - solid, $Br_(2)$ - liquid, and B - solid

Cr - solid, $Br_(2)$ - gas, and C - solid

Se - solid, Sn - solid, and Sr - solid

Thus, we can conclude that list of elements contains a solid, a liquid, and a gas is HF, Hg, He.

Related Questions

What part of a divers body is most effected by pressure?
Which is the equivalent of 750 joules? a. 0.750 kJ b. 7.50kJ c.75.0 kJ d. 750.kL
The reaction between an organic acid and an alcohol produces(1) an aldehyde (3) an ether(2) a ketone (4) an ester
The relationship between the "absolute temperature" on the Kelvin scale and the Celsius temperature is given bv: T(K) = t(°C) + 273.15 t(°C) = T(K) + 273.15 T(K) = 5/8[4°C)] - 32 D) T(K) = 8/5[t(°C)] + 32
Is the following a chemical change or a physical change? A pencil is sharpened in a pencil sharpener, leaving behind shaving. Physical Change Chemical Change

Which of the following is not a physical change? Melting ice

Breaking glass

Filtering a mixture

Burning paper

Answers

When you burn paper you are chemically altering it so that is the correct answer. When you do all the other choices all of the components stay the same. Just because it changes shapes doesn't mean it'll change chemically toom

Why do ionic compounds have high melitng points??

Answers

An ionic compound is arranged in a organised lattice structre that allows for the greatest electrostatic attraction between the opposite charged atoms and the lesser electrostatic repulsion between the same atoms, where the atoms are as closely packed as possible. So the amount of energy (in form of heat) needed to break the electrostatic attraction between the atoms, so this means that ionic compounds have very high melting points.

because of its bondsIonic bonds are very strong - a lot of energy is needed to break them. So ionic compounds have high melting and boiling points.

When an oxygen atom forms an ion, it gains two electrons. What is the electrical charge of the oxygen ion? A.
+2

B.
-1

C.
+1

D.
-2

Answers

D. 2- youre adding two negative charges to a neutral element

The electrical charge of the oxygen ion is -2.

As the temperature of a sample of matter is increased, what happens to the average kinetic energy of the particles in the sample?A. It decreases.
B. It increases.
C. It does not change.

Answers

Answer:

B. It increases.

Explanation:

The kinetic energy is associated with the motion of the particles of a substance.

When the temperature increases, the movement will increase, which means that the velocity of the particles will increase.

According to the mathematical defenition of kinetic energy

$Ek = (1)/(2) mv^(2)$

The higher the velocity, the higher the kinetic energy.

If the matter is made by a monoatomic gas, the relation between the kinetic energy and temperature is even more evident:

$Ec = (3)/(2)(R)/(Na) T$

R: gas constant

Na: Avogadro's number

T: temperature

it would be
B. it increases.

Of the following, which has the highest entropy?NaCl(s)

NaCl(aq)

NaCl(l)

NaCl(g)

Answers

The higher the order, the lower the entropy. Solids are most orderly and gases are least orderly, with liquids and aqueous in between. That said, NaCl(g) would have the highest entropy.

How many electrons would be found in an isotope of silicon 29