Atoms Structure

This video tutorial covers the basics of atomic structure, including the concepts of atomic number, mass number, and how to calculate the number of neutrons in an atom. It explains how atoms can become ions by gaining or losing electrons, resulting in positive or negative charges. The video also introduces isotopes, which are forms of elements with the same number of protons but different numbers of neutrons, leading to different mass numbers. The tutorial emphasizes the importance of understanding these concepts in both chemistry and physics.

What determines the type of element an atom is?

• The atomic mass

• The number of protons

• The number of electrons

• The number of neutrons

What does the atomic number of an element represent?

• The number of protons

• The mass of the atom

• The number of electrons

• The total number of protons and neutrons

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

• Multiply the atomic number by the mass number

• Divide the mass number by the atomic number

• Add the atomic number to the mass number

• Subtract the atomic number from the mass number

What is the relationship between atomic number and electrons in a neutral atom?

• The atomic number is always greater

• The atomic number equals the number of electrons

• The atomic number is less than the number of electrons

• The atomic number is unrelated to the number of electrons

What happens when an atom becomes a negative ion?

• It loses electrons

• It loses protons

• It gains electrons

• It gains protons

What is a positive ion?

• An atom with more electrons than protons

• An atom with more neutrons than protons

• An atom that has lost electrons

• An atom that has gained electrons

What remains unchanged when an atom becomes an ion?

• The atomic mass

• The overall charge

• The number of electrons

• The number of protons

What is an isotope?

• Atoms with the same number of protons but different numbers of neutrons

• Atoms with the same number of neutrons but different numbers of protons

• Atoms with the same atomic mass but different atomic numbers

• Atoms with the same number of electrons but different numbers of protons

Which of the following is true about isotopes of the same element?

• They have different numbers of electrons

• They have the same number of protons

• They have the same mass numbers

• They have different atomic numbers

How do isotopes of hydrogen differ?

• By the number of electrons

• By the number of protons

• By the atomic number

• By the number of neutrons