Stage 1 & 2

According to the electromagnetic spectrum which radiation has the largest wavelenght?

He established the first atomic theory.

It is the subatomic particle no electrically charged located in the nucleus.

Obtaining table salt involves to subject seawater to sunlight to evaporate water and separate the salt.

Match according to abundant elements:

Substances formed by the chemical combination of 2 or more elements

The current model (1926) is the planetary model.

It is the property to the wave related to the distance between 2 adjacent ridges (or valleys)

He performed the model known as “Solid sphere”

He concluded the atom has a nucleus and mostly empty space through gold foil experiment.

This model representation was developed by:

It is possible to fit up to 10 electrons in sublevel “d”.

Region of the space around the nucleus where it is very likely to find an electron in the atom

Sublimation is the transition from solid to gas.

This law states that elements combine to form compounds and they always do so in the same amount.

The fabric used in textile industry has empty spaces on its surface. What general property is referred to?

What is the lightest particle in the atom?

“n” is known as the main quantum number.

Atomic number of Uranium is 92 and its atomic mass is 238. Indicate the number of protons and neutrons.

Method used to separate components in blood samples.

They are known as quantum numbers.

John checks the number of red cells in a blood sample. Which step of scientific method is used in this procedure?

Theory that seeks to explain the nature of light & takes electromagnetic waves as a reference.

Identify the element using the following electron configuration:

What is the number of protons in the following isotopic notation?

Choose the option containing ONLY examples mixtures.

Bronze, steel & brass are homogeneous mixtures.

Matter cannot be created nor destroyed just transformed.

In the visible spectrum VIOLET has the highest energy and shortest wavelenght.

J. J. Thomson discovered the proton.

Choose the transition where energy is absorbed (endothermic)

It postulates: it is impossible to simultaneously know know the speed & position of an electron

What is the ability of a body to do work?

It is known as the angular or secondary quantum number.

What is the procedure used by Chemistry to study nature?

State of matter which has a defined shape and volume.