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Atomic Structure

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Subatomic Particles

Subtopic

Subatomic Particles under Atomic Structure for Grade 9 IB.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which statement best describes the location of protons?

    A.

    Scattered outside the atom

    B.

    In shells around the nucleus

    C.

    Inside the nucleus

    D.

    Moving between different atoms

  2. 2.

    In a neutral Hydrogen atom (Atomic Number 1), how many electrons are present?

    A.

    0

    B.

    1

    C.

    2

    D.

    3

  3. 3.

    Which particle has a positive charge and a mass of 11 amu?

    A.

    Electron

    B.

    Neutron

    C.

    Proton

    D.

    Nucleus

Download the worksheet for Atomic Structure - Subatomic Particles to practice offline. It includes additional chapter-level practice questions.

Atomic Number and Mass Number

Subtopic

Atomic Number and Mass Number under Atomic Structure for Grade 9 IB.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    An atom has a mass number of 32 and contains 16 neutrons. What is its atomic number?

    A.

    32

    B.

    16

    C.

    48

    D.

    8

  2. 2.

    Which particle is located in the nucleus and has a relative mass of 1?

    A.

    Electron

    B.

    Photon

    C.

    Proton

    D.

    Neutrino

  3. 3.

    How many protons are present in an atom of Calcium-40 (2040Ca^{40}_{20}Ca)?

    A.

    40

    B.

    60

    C.

    20

    D.

    80

Download the worksheet for Atomic Structure - Atomic Number and Mass Number to practice offline. It includes additional chapter-level practice questions.

Isotopes

Subtopic

Isotopes under Atomic Structure for Grade 9 IB.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    The total number of protons and neutrons in the nucleus of an atom is called the:

    A.

    Atomic mass unit

    B.

    Atomic number

    C.

    Mass number

    D.

    Isotopic balance

  2. 2.

    If an atom has the same number of protons and electrons, but a different number of neutrons than another atom of that element, it is a neutral:

    A.

    Ion

    B.

    Isotope

    C.

    Isomer

    D.

    Molecule

  3. 3.

    Which of the following is an isotope of 612C^{12}_{6}C?

    A.

    512B^{12}_{5}B

    B.

    714N^{14}_{7}N

    C.

    613C^{13}_{6}C

    D.

    612C^{12}_{6}C is not an isotope

Download the worksheet for Atomic Structure - Isotopes to practice offline. It includes additional chapter-level practice questions.

The Periodic Table Trends

Subtopic

The Periodic Table Trends under Atomic Structure for Grade 9 IB.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What is the name for the rows at the very bottom of the Periodic Table, separate from the main body?

    A.

    Alkali Metals

    B.

    Noble Gases

    C.

    Lanthanides and Actinides

    D.

    Halogens

  2. 2.

    How many protons are in an atom of Aluminum (Atomic number 13)?

    A.

    26

    B.

    13

    C.

    10

    D.

    3

  3. 3.

    Which of the following is a noble gas used in light bulbs and signs?

    A.

    Oxygen

    B.

    Nitrogen

    C.

    Neon

    D.

    Chlorine

Download the worksheet for Atomic Structure - The Periodic Table Trends to practice offline. It includes additional chapter-level practice questions.

Atomic Structure - IB Grade 9 Science Notes & Revision | Krit.club