Select the correct concept.

Select the correct examples of heterogeneous mixtures.

Which is NOT a homogeneous mixture separation method?

State of matter that takes the shape of the container and has a definite volume.

Which is a chemical property?

The oxidation of an apple is a:

How many elements are found in nature?

Is the smallest particle of an element that retain all the properties of that element.

Number of the protons in an Atom.

Atoms with the same number of buttons but different numbers of neutrons.

Total number of protons and neutrons in the nucleus.

A proton and an electron have opposite charges.

Has a mass about the same as a proton.

Is the smallest particle of an element

how many elements are known?

which are the 3 classifications of elements?

they are formed when two atoms of an element share electrons to be more stable

they are not shiny, ductile or malleable

they have high melting points

One- or two- letter abreviations of the names of the elements

In 1869, Who arranged the 60 elements known at the time into groups with similar properties and placed them in order of increasing mass?

The horizontal rows in the periodic table are called...

Groups 1,2 and 13 to 18 in the modern periodic table are called...

Groups 3 to 12 are referred to as representative elements

In group 17 you can find the...

He discovered electrons in 1897, and subsequently produced the “plum-pudding” model of the atom.

Schrödinger’s equation applies equally well to elements other than hydrogen.

Who said this quote “matter is made up of tiny individual particles called atoms. Atoms could not be created, destroyed or further divided.”?

Region around the nucleus that describes the electron´s probable location.

He stated that electrons do not move in set paths around the nucleus, but in waves. He also stated that is impossible to know the exact location of the electrons, instead we have “clouds of probability” called orbitals

States that it is fundamentally impossible to know precisely both the velocity and position of a particle at the same time.

Identify the change of state with the following description:

"From liquid to solid"

Identify the change of state from the following description:

"From solid to liquid"

Identify the change of state from the following description:

"From solid to gas without passing through liquid"

Identify the temperature curves with the following description:

"Temperature at which a liquid changes to solid"

Identify if the the following description corresponds to a natural or anthropogenic phenomena:

"Chemical reactions that sustain life and maintain equilibrium between living organisms. Relation between living things and the environment."

Identify if the the following description corresponds to a natural or anthropogenic phenomena:

"Are consequence of human action, include all type of pollution."

Is the force that holds two atoms together in a compound and makes them to work as a unit.

Resulting from the reaction of a metal with a nonmetal.

The electrons are shared equally by the nuclei.

The electrons are shared unequally between atoms.

High melting, boiling, hardness and electric conductivity when is dissolved are characteristics of:

The higher the value of electronegativity, the more capacity it has to____________ the shared electrons in a bond.

All the atoms give their valence electrons to form a "sea" of electrons. ¿Which type of bond it is?

Substance formed by the combination of two or more atoms of different elements.

Cation H+ + Element, is a rule for:

Cation + OH-, is a rule for:

Cation + anion “ide”

Metal + O-2 is a rule for: