Exploring Atoms and Ions in GCSE Chemistry

The video explains the fundamental structure of atoms, which are composed of a nucleus with protons and neutrons, surrounded by electrons. It discusses the relative mass and charge of these particles, the size of atoms, and the concept of ions formed by gaining or losing electrons. The video also introduces the periodic table, explaining how atomic and mass numbers define elements.

What is the basic structure of an atom?

• A central nucleus surrounded by neutrons

• A central nucleus surrounded by protons

• A central nucleus surrounded by atoms

• A central nucleus surrounded by electrons

Which particles are found in the nucleus of an atom?

• Neutrons and electrons

• Electrons only

• Protons and neutrons

• Protons and electrons

What is the relative mass of protons and neutrons?

• Both protons and neutrons have a relative mass of 0

• Protons have a mass of 0, neutrons have a mass of 1

• Both protons and neutrons have a relative mass of 1

• Protons have a mass of 1, neutrons have a mass of 0

How does the mass of an electron compare to that of a proton?

• Electrons have no mass

• Electrons have the same mass as protons

• Electrons are 2000 times heavier than protons

• Electrons are 2000 times lighter than protons

What is the approximate radius of an atom?

• 10 nanometers

• 0.01 nanometers

• 0.1 nanometers

• 1 nanometer

What happens to an atom when it gains an extra electron?

• It remains unchanged

• It becomes a negative ion

• It becomes a neutral atom

• It becomes a positive ion

What do we call an atom that has lost electrons?

• A proton

• A neutral atom

• A positive ion

• A negative ion

What information does the atomic number of an element provide?

• The number of electrons in the atom

• The total mass of the atom

• The number of protons in the atom

• The number of neutrons in the atom

How do you calculate the number of neutrons in an atom?

• Divide the atomic number by the mass number

• Multiply the atomic number by the mass number

• Add the atomic number to the mass number

• Subtract the atomic number from the mass number

What does the elemental symbol 'O' represent?

• Oxygenium

• Osmium

• Oganesson

• Oxygen