Science

Atomic Structure

100

How many electrons fit in each shell around an atom?

The first shell (closest to the nucleus) can hold two electrons. The second shell can hold 8 electrons. The third shell can hold 32 electrons.

200

How do I find the number of protons, electrons and neutrons that are in an atom of an element?

The number of electrons in a neutral atom is equal to the number of protons.

300

Do atoms ever actually touch each other?

there's nothing to “touch,”

400

Are two atoms of the same element identical?

No. Two atoms of the same chemical element are typically not identical.

500

 How do I read an electron configuration table?

The tiny superscripts say how many electrons live in each orbital, the letters represent the orbitals that are available, and the big numbers say which energy level the orbitals are found in.

Terminology

100

(A) vocabulary in science 

Atom

200

(B) vocabulary in science 

Boron

300

(C) vocabulary in science 

Carbon 

400

(I) vocabulary in science 

Iridium

500

(X) vocabulary in science 

Xenon

Mixtures

100

What is a mixture?

a mixture is a compound made up of two or more chemical components that are not chemically linked.

200

What are examples of chemical mixtures?

  blood, milk, salt and water, sand and water

300

what is a heterogeneous mixture 

A heterogeneous mixture is a mixture in which the composition is not uniform throughout the mixture.

400

what is a homogeneous mixture 

A homogeneous mixture is a gaseous, liquid or solid mixture that has the same proportions of its components throughout a given sample

500

What are five mixtures

• Smoke and fog (Smog)
• Sand, water and gravel (Cement)
• Oxygen and water (Sea foam)
• Potassium nitrate, sulfur, and carbon (Gunpowder)
• Dirt and water (Mud)

Formula/Naming

100

AlF₃

Aluminium Fluoride 

200

CO₂

Carbon Dioxide

300

MgCl₂

Magnesium Chloride 

400

H₂S

Hydrogen Sulphide 

500

C₄H₁₀

Butane

Random

100

Which is the main gas that makes up the Earth's atmosphere?

The air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen.

200

What is the hardest natural substance on Earth?

Diamond is the hardest substance found on earth

300

What does DNA stand for?

Deoxyribonucleic acid

400

How many bones are in the human body?

The adult human skeleton is made up of 206 bones.

500

The concept of gravity was discovered by which famous physicist?

Isaac Newton changed the way we understand the Universe