Science 8th Grade - The Periodic Table, Atoms, and Mendeleev

Note: Anwer with term!!

Protons, neutrons, electrons, an electron cloud, and the nucleus.

What does the basic structure of an atom contain?

Protons, neutrons, and electrons.

What are the subatomic particles?

What is the mass of a proton?1 AMU

What is the mass of a proton?

1 AMU

What is the mass of a neutron?

1/2000 AMU

What is the mass of an electron?

Positive (+)

What is the charge of a proton?

None (0)

What is the charge of a neutron?

Negative (-)

What is the charge of an electron?

Protons and neutrons.

Which two subatomic particles are found in the nucleus?

Atoms of the same element that have different numbers of neutrons.

Isotopes

They have different amounts of neutrons.

What is the difference between each isotope?

Atomic number = protons = electrons.

What does APE stand for?

Mass number - atomic number = neutrons.

What does MAN stand for?

The protons and electrons cancel out each other.

Why is a stable atom's overall charge neutral even though it is made of charged particles?

The original increases by atomic mass, but it now increases by atomic number.

How is the modern periodic table different from Mendeleev's original periodic table?

6

What is the atomic number of this element?

C

What is the symbol of this element?

Carbon

What is the element?

12

What is the atomic mass of the element?

6

How many protons are there in this element?

6

How many electrons are there in this element?

6

How many neutrons are there?

Are commonly referred to as 'rare earth metals'. They are placed off the table with Actinides so there's enough space and the periodic table is easier to read. They are often used for magnets, batteries, and hybrid cars.

Lanthanides

They are placed off the table with Lanthanides so there's enough space and the periodic table is easier to read. All of them are radioactive.

Actinides

These elements are not stable, decay radioactively into another element, and are not found in nature. These elements are made in a laboratory when nuclear particles are forced to crash into one another.

Transuranium Elements

These metals are located in the very left of the periodic table and are vert radioactive. These metals are also very shiny and soft.

Alkali Metals

These metals are very reactive and are hard and dense.

Alkaline Earth Metals

These metals take up most of the middle of the periodic table. They can also conduct electricity easily. They're hard, shiny, and have high melting points.

Transition Metals

These nonmetals are the most reactive of nonmetals.

Halogens

These elements are non-reactive.

Noble Gases