Question: What Type Of Compound Could Be A Liquid At Room Temperature And Standard Pressure?

Which element is least likely to react with elements?

Noble gasesNoble gases are the least reactive of all elements.

That’s because they have eight valence electrons, which fill their outer energy level.

This is the most stable arrangement of electrons, so noble gases rarely react with other elements and form compounds..

What kind of compounds are solid at room temperature?

Ionic compounds typically are solids at room temperature. They form a crystal lattice structure when more than one molecule is present (see Figure A). Notice that the positive charges and negative charges alternate. This results in a very strong attractive force between all atoms of the crystal.

Is NaCl a solid liquid or gas?

NaCl – or pure sodium chloride is neither at room temperature and is, in fact a white, ionic, crystalline solid. You seem to be thinking of sodium chloride SOLUTION which is a mixture of sodium chloride and water. Water, as the solvent, gives the aqueous solution its liquid properties.

What are 3 substances that are solids at room temperature?

We can name some chemical elements that in nature are solids at room temperature: Aluminium (Al): it is a dultile metal with a color between silver and white. Sulfur (S₈): it is a pale yellow solid. Zinc (Zn): it is a metallic brittle solid.

Which non metal is liquid at room temperature?

bromineOne non-metal, bromine, is a liquid at room temperature. The other non-metals are solids at room temperature, including carbon and sulfur.

How do you determine if a compound is a liquid at room temperature?

If the normal melting point of a substance is below room temperature, the substance is a liquid at room temperature. Benzene melts at 6°C and boils at 80°C; it is a liquid at room temperature. If both the normal melting point and the normal boiling point are above room temperature, the substance is a solid.

Which of these substances is a liquid at room temperature and standard pressure?

For science, it’s usually considered to be either 20°C or 25°C. At this temperature and ordinary pressure, only two elements are liquids: Bromine. Mercury.

How do you determine the state of a substance in a chemical equation?

Notation for a Chemical Equation The state of matter of each compound or molecule is indicated in subscript next to the compound by an abbreviation in parentheses. For example, a compound in the gas state would be indicated by (g), solid (s), liquid (l), and aqueous (aq).

How do you know when something is a solid?

Something is usually described as a solid if it can hold its own shape and is hard to compress (squash). The particles in most solids are closely packed together. … Ice is water in its solid form or state. Ice keeps its shape when frozen, even if it is removed from its container.

What substances are left in the liquid mixture?

Answer:liquid po.sand,staple wire,salt,oil and water.If the solution is stirred, then the substances left are sand, staple wire, and oil. Since salt is soluble, its particles will just be mixed with the particles of the can we separate oil from water?

Which colorless substance is a liquid at − 30 C?

EthanolWhich colorless substance is a liquid at −30°C? Ethanol is a liquid at -30 degrees C.

Why are some compounds liquid at room temperature?

Heavier molecules must be heated to a higher temperature before they can move fast enough to escape from the liquid. They therefore tend to have higher boiling points and are more likely to be liquids at room temperature. … The only difference between these compounds is their size and therefore their molecular weights.

How do you know if a compound is solid liquid or gas?

Two factors determine whether a substance is a solid, a liquid, or a gas: The kinetic energies of the particles (atoms, molecules, or ions) that make up a substance. Kinetic energy tends to keep the particles moving apart.

What are some things we can observe when a chemical reaction takes place?

How can I tell if a chemical reaction is occurring? A chemical reaction is usually accompanied by easily observed physical effects, such as the emission of heat and light, the formation of a precipitate, the evolution of gas, or a color change.

What will serve as evidence that a reaction has occurred?

Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color chage, formation of a precipitate, formation of a gas, odor change, temperature change.

How do you determine the physical state of a compound?

Finding and Identifying States of MatterLocate the parentheses after the chemical formula, whether or not it is within the context of an equation.Identify the parentheses as (s) for solid, (l) for liquid, (g) for gas, or (aq) for aqueous solution.More items…

Which substance is liquid at 30 degrees Celsius?

Galliumliquid at 30°C Gallium (Ga, element 31) melts at 30ºC, slightly above room temperature, but is often indicated as a liquid on periodic tables, since the solid metal literally melts when held in the hand (since body temperature is about 37ºC).