Atomic model

Atomic matter

Matter is anything that has mass and takes up space. Matter is made up of atoms. Atoms contain even smaller parts called protons, neutrons, and electrons.

Multiple Choice

Matter is anything that has ________ and takes up ________.

• mass, space

• weight, area

Atomic model

Scientists have developed a model of what the inside parts of atoms look like. In very simple terms an atom's parts are located in two spaces, the nucleus and in energy levels or shells that are around the nucleus. In the nucleus of every atom you can find one or more protons and neutrons. A proton is a positively charged particle and a neutron is a particle that has no charge. Electrons have a negative charge. Electrons orbit the nucleus in the shells or energy levels.

Atomic model

Multiple Choice

The center of an atom is called the _______.

• nucleus

• orbit

• shell

• proton

Multiple Choice

Which two particles can be found in the nucleus of an atom?

• electrons and neutrons

• protons and neutrons

• protons and electrons

• proton

Multiple Choice

Which particle can be found orbiting the nucleus of an atom?

• protons

• neutrons

• electrons

• proton

Atomic model

Atoms usually have the same number of electrons and protons (negative and positive charges) which causes them to have a neutral charge.

Multiple Choice

The two atoms contain the same number of ________.

• neutrons

• electrons

• protons

Periodic table of the elements

During the time of Aristotle, people thought that everything was made up of a combination of air, fire, water, and earth. Today we know that there are a certain number of elements that make up all matter on Earth.

Elements

Each element is represented by a symbol of one or two letters that stands for its name. The elements are listed in rows horizontally in order of their atomic number and in columns vertically in families, or groups. These families share similar chemical properties.

Multiple Choice

What is lithiums atomic number?

• 2

• 3

• 6

• 8

Multiple Choice

The atomic symbol __ represents the chemical element ____.

• neon, 10

• 10, Ne

• neon, Ne

• Ne, neon

Multiple Choice

What is the chemical element with the atomic number 14?

• aluminum

• silicon

• phosphorous

• sulfur

Multiple Choice

What is the atomic symbol of the element with the atomic number 27?

• Fe

• Co

• Ni

• Cu

Multiple Choice

All atoms contain one or more positively charged particles called ________.

• protons

• neutrons

• electrons

• quarks

Multiple Choice

In many atoms, the nucleus also contains ________, which have no electrical charge.

• chemical element

• neutrons

• atomic number

• electrons

Multiple Choice

The number of protons in an atom is the atom's ______ _________.

• electrons

• atomic symbol

• atomic number

Multiple Choice

The periodic table contains information about each element, often including a short version of the element's full name called its __________.

• chemical element

• atomic symbol

• atomic number