Understanding Basic Atomic Structure

Mr. Lodge introduces atoms as the fundamental building blocks of matter, explaining their tiny size with examples like grains of salt and sheets of paper. He discusses elements, highlighting that each is made of identical atoms, and introduces the periodic table, which organizes elements by properties. The video concludes with a look at subatomic particles—protons, neutrons, and electrons—detailing their roles in the atom's structure and charge neutrality.

What is the fundamental building block of all matter?

• Compounds

• Cells

• Atoms

• Molecules

How many atoms are approximately in a grain of salt?

• One million

• Three million

• One billion

• Three million trillion

What is an element?

• A mixture of different atoms

• A compound of various molecules

• A type of chemical reaction

• A substance made of identical atoms

Which of the following is true about copper and lead?

• They are made of different types of atoms

• They are made of the same type of atoms

• They are not elements

• They have the same atomic structure

What is the periodic table?

• A table of chemical reactions

• A list of atomic weights

• A list of all known compounds

• A chart of all known elements

How are elements represented in the periodic table?

• By a symbol with a capital and lowercase letter

• By their atomic number

• By their chemical formula

• By their molecular weight

What is the role of protons in an atom?

• They determine the atom's mass

• They give the atom its identity

• They carry a negative charge

• They orbit the nucleus

Which subatomic particle has no charge?

• Proton

• Electron

• Neutron

• Photon

What ensures that an atom is neutral?

• Equal number of electrons and neutrons

• Equal number of protons and neutrons

• Equal number of protons and electrons

• Equal number of protons and photons

Where are electrons located in an atom?

• In the atomic core

• Inside the nucleus

• Between protons and neutrons

• Orbiting the nucleus