GCSE Chemistry - Atoms & Ions #1

The video explores the structure of atoms, which are composed of a nucleus with protons and neutrons, surrounded by electrons. It explains the relative mass and charge of these particles, the size of atoms, and how they can form ions by gaining or losing electrons. The video also introduces the periodic table, explaining how atomic and mass numbers determine the identity of elements.

What is the relative mass of protons and neutrons in an atom?

• 10,000

• 0

• 1

• 2000

What is the charge of an electron?

• +1

• +2

• 0

• -1

How does an atom become a negative ion?

• By losing an electron

• By gaining an electron

• By gaining a neutron

• By losing a proton

What is the size comparison between the nucleus and the atom?

• The nucleus is 10,000 times smaller than the atom

• The nucleus is 100 times smaller than the atom

• The nucleus is 10 times smaller than the atom

• The nucleus is the same size as the atom

What does each box in the periodic table represent?

• A mixture

• A compound

• An element

• A molecule

What does the atomic number indicate?

• The number of atoms

• The number of protons

• The number of neutrons

• The number of electrons

How can you determine the number of neutrons in an atom?

• By adding the atomic number and mass number

• By subtracting the atomic number from the mass number

• By dividing the mass number by the atomic number

• By multiplying the atomic number by the mass number