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Approximately how many kelvins are equal to 60 degrees F

289

To keep them from reacting, some highly reactive elements are stored in

Argon

The Greek philosopher Democritus coined hat word for a tiny piece of matter that cannot be divided?

Atom

Chapter 2

Chapter 2

Chapter 3

Chapter 3

Chapter 4

Chapter 4

Chapter 5

Chapter 5

What kind of change would see if a piece of paper where to catch on fire

Chemical change

What is something with high viscosity

Corn syrup

Who provided evidence for the existence of a nucleus is an atom

Ernest Rutherford

What is a very reactive halogen

F(fluorine)

During which phase change does the arrangement of water molecules become more orderly?

Freezing

In what kind of mixture that parts of the mixture are noticeable different

Heterogeneous

How was Bohr's atomic model similar to Rutherford's model?

It describes a nucleus in surrounded by a large volume of space

The SI base of unit of mass is

Kelvins

99% of all matter that can be observed in the universe exists as

Plasma

What is a system of knowledge and the methods used to find that knowledge

Science

Why are peer reviews important

Scientists receive questions and criticism from other scientists

Which of the following statements is true about scientific theories

They are never proven

What are building blocks of all matter

amtoms

The unit for atomic mass is

amu

The standard on which the atomic mass unit is based is the mass of

carbon-12 atom

What is an example of a pure substance

compounds or element

During a phase change, the temperature of a substance

does not change

A substance that is made up of only one kind of atom ia an

element

Collisions of helium atoms with the walls of a closed container cause

gas pressure

In Niels Bohr's model of the atom, electrons move

like planets orbiting the sun

The heat of fusion for water is the amount of energy needed for water to

melt

Group 7a of the periodic table cantinas the

most reactive nonmetals

The glowing neon light is caused by electrons emitting energy as they

move from higher to lower energy levels

Flammability is a material that is able to burn in the presence of

oxegen

What do scientist use to predict the locations of electrons in atoms

probability

What is the variable that changes in response to the manipulated variable

responding variable

The tendency of an element to react is closely related to

the number of valence electrons in atoms of the element

According to john Dalton's observations, when elements combine is a compound

the ratio of their masses is always the same

A mixture can be classified as a solution, suspension, or colloid based on

the size of it's largest particle

What are a list of elements that are all only metals

tin, copper, ceisuim

The phase change that is reversed of condensation

vaporization

What statement is true about ice melting

water molecules move from their fixed position


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