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Atomic Structure

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卡片总数: 23 张•内容版本: v4•公开卡包•更新时间: 8/1/2026

卡片预览 (23 张)

#1
正面 (问题)

1. What is an element?

背面 (解答)

• A substance made of one type of atom.

#2
正面 (问题)

• What is a compound?

背面 (解答)

• A substance made of two or more elements chemically combined.

#3
正面 (问题)

• What is a mixture?

背面 (解答)

• A substance made of two or more elements or compounds NOT chemically combined.

#4
正面 (问题)

• What technique do you use to separate water from salt water?

背面 (解答)

• Distillation. The water will evaporate and then condense. The salt will remain.

#5
正面 (问题)

• What technique do you use to separate sand from salt water?

背面 (解答)

• Filtration. The sand will be left in the filter (residue).

#6
正面 (问题)

• How many atoms are in a molecule of CO2

背面 (解答)

• 3

#7
正面 (问题)

• How many elements are in a molecule of CO2

背面 (解答)

• 2 (carbon and oxygen)

#8
正面 (问题)

• Write the word equation for the reaction between iron and oxygen to make iron oxide.

背面 (解答)

• Iron + oxygen –> iron oxide

#9
正面 (问题)

• Describe the plum pudding model of the atom.

背面 (解答)

• A cloud of positive charge with small negatively charged electrons scattered in it.

#10
正面 (问题)

• What two conclusions were made from the alpha particle scattering experiments.

背面 (解答)

• The mass of an atom is concentrated in the centre (nucleus). The nucleus is charged.

#11
正面 (问题)

• How did Bohr and Chadwick improve the atomic model?

背面 (解答)

• Electron shells

#12
正面 (问题)

• What is the radius of the atom?

背面 (解答)

• 0.1nm

#13
正面 (问题)

• How big is radius of the nucleus compared to the radius of the atom?

背面 (解答)

• 1/10,000 time smaller

#14
正面 (问题)

• What is 1nm in metres in standard form?

背面 (解答)

• 1 x 10-9 m

#15
正面 (问题)

• What is the relative mass of protons, neutrons and electrons?

背面 (解答)

• 1,1,0

#16
正面 (问题)

• What is the relative charge of protons, neutrons and electrons?

背面 (解答)

• +1, 0 , -1

#17
正面 (问题)

• What does the atomic number tell you about an atom?

背面 (解答)

• The number of protons (which is equal to the number of electrons)

#18
正面 (问题)

• What does the mass number tell you about an atom?

背面 (解答)

• The total number of protons and neutrons.

#19
正面 (问题)

• How many protons, neutrons and electrons are in sodium?

背面 (解答)

• 11, 12, 11

#20
正面 (问题)

• How do atoms become ions?

背面 (解答)

• Lose or gain electrons

#21
正面 (问题)

• What is an isotope?

背面 (解答)

• Same element, different number of neutrons

#22
正面 (问题)

• How many electrons fit into the first, second and third electron shells?

背面 (解答)

• 2,8,8

#23
正面 (问题)

• Why do elements in the same column of periodic table have similar chemical properties?

背面 (解答)

• Same number of electrons in outer shell.