GRADE 9 Integrated Science – Structure of the atom Quiz
1. What is the smallest unit of an element that retains the properties of that element?
An atom is the smallest unit of an element that retains the properties of that element.
2. Which subatomic particle has a positive charge?
A proton is a subatomic particle with a positive charge.
3. Which subatomic particle has a negative charge?
An electron is a subatomic particle with a negative charge.
4. Which subatomic particle has no charge?
A neutron is a subatomic particle with no charge.
5. Which part of the atom is located in the nucleus?
The nucleus of an atom contains the neutrons and protons.
6. Which subatomic particle determines the chemical properties of an element?
Electrons determine the chemical properties of an element through their arrangement in the electron cloud.
7. What is the atomic number of an element equal to?
The atomic number of an element is equal to the number of protons in its nucleus.
8. Which subatomic particle is involved in chemical bonding between atoms?
Electrons are involved in chemical bonding between atoms by forming bonds with other atoms' electrons.
9. What is the charge of an atom as a whole?
An atom as a whole is neutral because the number of protons (positive charge) equals the number of electrons (negative charge).
10. What is the mass number of an atom determined by?
The mass number of an atom is determined by adding the number of protons and neutrons in its nucleus.
11. Which subatomic particle is defined by the orbital it occupies around the nucleus?
Electrons are defined by the energy levels or orbitals they occupy around the nucleus of an atom.
12. What does an isotope of an element have a different number of compared to other atoms of the same element?
Isotopes have a different number of neutrons compared to other atoms of the same element while maintaining the same number of protons.
13. Which subatomic particle contributes to the mass of an atom?
Neutrons and protons contribute to the mass of an atom in the nucleus, while electrons have negligible mass.
14. What is the approximate mass of a proton or neutron?
The approximate mass of a proton or neutron is 1 atomic mass unit (amu).
15. Which subatomic particle determines the isotope of an element?
The number of neutrons in the nucleus determines the isotope of an element as different isotopes have different neutron numbers.
16. What is the structure of an atom mostly made up of?
The structure of an atom is mostly made up of electrons in orbitals surrounding the nucleus.
17. Which subatomic particle has the least mass?
An electron has the least mass compared to a proton or neutron.
18. What is the overall charge of an atom with 10 protons, 10 neutrons, and 10 electrons?
The atom is neutral because the number of protons (positive charge) equals the number of electrons (negative charge), canceling out to give an overall neutral charge.
19. What is the center of an atom called?
The center of an atom, containing the protons and neutrons, is called the nucleus.
20. Which subatomic particle has a mass of approximately 1 amu?
A proton has a mass of approximately 1 atomic mass unit (amu).
21. How does the number of protons in an atom affect its identity as an element?
The number of protons in an atom (atomic number) determines the chemical properties of that element, defining it as a unique element.
22. Which subatomic particle moves around the nucleus in specific energy levels?
Electrons move around the nucleus in specific energy levels or orbitals, contributing to the atom's reactivity.
23. How does the number of neutrons in an atom affect its stability?
The number of neutrons in an atom affects its stability by determining the isotope of that element, leading to variations in nucleus stability.
24. What is the sum of the protons and neutrons in the nucleus called?
The sum of the protons and neutrons in the nucleus is called the mass number, indicating the total mass of the atom.
25. Which subatomic particle has a charge of -1?
An electron has a charge of -1, giving it a negative charge which balances the positive charge of protons in an atom.
26. What is the name of the atoms with the same number of protons but different numbers of neutrons?
Atoms with the same number of protons but different numbers of neutrons are called isotopes, leading to variations in atomic mass.
27. Which subatomic particle contributes to the atomic number of an atom?
The atomic number of an atom is determined solely by the number of protons in its nucleus, defining the element.
28. Which subatomic particle has a positive charge?
A proton has a positive charge and is located in the nucleus of an atom.
29. What is the charge of an electron?
An electron has a negative charge and orbits the nucleus of an atom.
30. Which subatomic particle is responsible for the mass of an atom?
Neutrons have mass and are found in the nucleus along with protons, contributing to the overall mass of an atom.
31. The nucleus of an atom is composed of which subatomic particles?
The nucleus of an atom contains protons and neutrons, while electrons orbit around the nucleus.
32. Which subatomic particle is located in the nucleus of an atom?
Protons are found in the nucleus of an atom, along with neutrons, while electrons orbit around the nucleus.
33. What is the overall charge of an atom?
An atom is neutral because the number of protons (positive charge) equals the number of electrons (negative charge), balancing out the overall charge.
34. Which subatomic particle has no charge?
Neutrons have no charge (neutral) and are located in the nucleus along with protons.
35. The number of protons in an atom determines the atom's...
The number of protons in an atom defines the element, as different elements have different numbers of protons in their nucleus.
36. What are atoms of the same element with different numbers of neutrons called?
Isotopes are atoms of the same element that have different numbers of neutrons, resulting in varying atomic masses.