問 1
1 点An atom of sodium can be represented as \( {}_{11}^{23}\text{Na} \).
What are the relative electrical charges of a proton and an electron?
Oxford AQA IGCSE · Chemistry (9202)
A simple model of the atom：練習問題
その場で採点される選択問題 5 問と、解説つきの記述問題 5 問。すべて「A simple model of the atom」からの出題です。
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問 2
1 点Which row in the table correctly identifies the relative mass and relative charge of a proton?
A. Mass: 1, Charge: +1
B. Mass: 1, Charge: 0
C. Mass: Very small, Charge: +1
D. Mass: 1, Charge: –1
問 3
1 点A metal atom reacts to form an ion with a charge of \( 2+ \). If the ion has 18 electrons and a mass number of 40, what is the identity of the element and how many neutrons does it have?
問 4
1 点The mass number of an atom is defined as the total number of specific subatomic particles in the nucleus. Which statement correctly describes the mass number?
問 5
1 点The 'plum pudding' model suggested that the atom was a ball of positive charge with negative electrons embedded in it. Which experimental result directly contradicted this by showing that the positive charge was concentrated in a small center?
問 6
2 点An atom of an element is represented by the symbol \( {}_{15}^{31}\text{P} \).
Determine the number of protons and the number of neutrons located in the nucleus of this atom.
まず自分で答えを書いてから、解説と照らし合わせましょう。
問 7
3 点An atom of an unknown element has the electronic structure 2, 8, 7. Identify the element and state which group of the periodic table it belongs to.
まず自分で答えを書いてから、解説と照らし合わせましょう。
問 8
6 点Boron has two isotopes, \( ^{10}_{5}B \) and \( ^{11}_{5}B \). Compare the subatomic particles in these isotopes and explain why they react in the same way chemically.
まず自分で答えを書いてから、解説と照らし合わせましょう。
問 9
4 点(a) Define the term mass number of an atom. (1 point)
(b) An atom of an element is represented as \( ^{24}_{12}\text{Mg} \). Determine the number of protons, neutrons, and electrons present in this neutral atom. (3 points)
まず自分で答えを書いてから、解説と照らし合わせましょう。
問 10
4 点The structure of the atom is the basis for understanding chemistry. An atom of Phosphorus is represented by the symbol \( ^{31}_{15}P \).
(a) Determine the number of protons, neutrons, and electrons in a neutral atom of this isotope.
(b) State the electronic structure of this Phosphorus atom in the form \( x,y,z \).
(c) Explain why the overall electrical charge of this Phosphorus atom is zero.
まず自分で答えを書いてから、解説と照らし合わせましょう。
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