Chemistry

it is easy to determine whether a substance is a metal if the substance is ...

a good electrical and heat conductor.

A physical change occurs when a ...

Glue gun melts a glue stick.

find the symbol for the element helium.

He

find the symbol for the element iodine.

I.

if a mixture is uniform in composition, it is said to be ...

homogeneous.

Which of the following is an intensive property of matter?

Amount of energy.

Plasma is the fourth state of matter. in the plasma state ...

Atoms lose electrons.

find the symbol for the element cholorine.

Cl.

A measure of the quality of matter is ...

Mass.

Which of the following is not a chemical change?

Melting.

Biochemistry is the study of ...

The chemistry of living things.

An atom is ...

The smallest unit of matter that maintains its chemical identity.

Applied reasearch is carried out in order to ...

To solve a particular problelm.

example the difference between a pure substance and a homogeneous mixture. use an example in your answer.

a pure substance is pure. it hasn't been mixed with anything or together with something else. a homogenous mixture is mixed with other things like orange juice. the acid is pure substance but when you mix it with other substances it became a homogenous mixture.

which of the following is an example of homogeneous mixture?

air.

find the name for the element whose symbol is Al.

aluminum.

a scientist is using mathematical models to isolate a new chemical process. he is working in the field of ___ chemistry.

analitical.

a team of scientists is working to discover how an enzyme affects blood cells in sheep. they are working in the field of ___ chemistry.

biochemistry.

why can a gas fill the entire volume of its container?

gas can fill the entire volume of its container because the gas is everywhere so it takes up more space.

which of the following is an example of a heterogeneous mixture?

granite.

the vertical columns on the periodic table are called ...

groups.

if a mixture is not uniform throughout, it is called...

heterogeneous.

what happens to the energy in a substance when it changes state?

it changes form, but is neither destroyed nor increased.

find the name for the element whose symbol is Pb.

lead.

the particles of a substance in the ___ are able to slide past each other.

liquids.

in which period can you find the element gold?

period 6.

all known chemical elements are organized into groups based on similar chemical properties in the ...

periodic table.

the horizontal rows on the perodic table are called...

periods.

find the name for the element whose symbol is P.

phosphorus.

applied reasearch is often performed to find the answer to a particular___.

question.

compare and contrast solids, liquids, gases, and plasma by explaining the behavior of their particles. draw models to illustrate your answer.

solids are all squished together where the particles can barely move. liquids are still together but the particles can still move little by little. the gases picture is that the particles move fast where they bounce off the wall and keep going but the move fast. plasma is when the particles move faster than gases and bounce back and forth. i think they are all similar because they can still move around, some faster than others, and they take up volume. they are different but same because they slowly start to lose electrons.