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Topic 1 Structure of atom and Periodic Table

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Total cards: 24•Content version: v3•Public deck•Updated: 8/1/2026

Card preview (24)

#1
Front (Question)

1 What A is all matter made of?

Back (Answer)

atoms

#2
Front (Question)

2 Which scientist first came up with a model of what atoms are like?

Back (Answer)

Dalton

#3
Front (Question)

3 How did Dalton describe atoms?

Back (Answer)

tiny indestructible spheres

#4
Front (Question)

4 How did he use his model to explain elements?

Back (Answer)

all the atoms in an element were identical (and different from other elements)

#5
Front (Question)

5 What is the difference between an atom and a molecule?

Back (Answer)

molecules contain two or more atoms chemically joined together in a group

#6
Front (Question)

6 How did Dalton explain what happened when compounds were formed?

Back (Answer)

atoms of different elements joined together to form the compound

#7
Front (Question)

7 What tiny particles flow in an electric current?

Back (Answer)

electrons

#8
Front (Question)

8 What charge do electrons particles have?

Back (Answer)

negative

#9
Front (Question)

9 What particles are found in an atom?

Back (Answer)

protons, neutrons and electrons

#10
Front (Question)

10 What is the nucleus of an atom?

Back (Answer)

tiny central part of an atom made up of protons and neutrons

#11
Front (Question)

11 How have Daltons ideas about atoms changed?

Back (Answer)

atoms are not indestructible but are made up of smaller particles (protons, neutrons and electrons)

#12
Front (Question)

12 What are the names of the three main subatomic particles?

Back (Answer)

protons, neutrons, electrons

#13
Front (Question)

13 What is the nucleus of a helium atom made up of?

Back (Answer)

protons and neutrons

#14
Front (Question)

14 How are electrons arranged in an atom?

Back (Answer)

circling/orbiting the nucleus in regions called shells

#15
Front (Question)

15 How do protons and electrons compare in terms of relative charge?

Back (Answer)

protons have a positive (+1) charge and electrons have a negative (-1) charge

#16
Front (Question)

16 Why are most atoms neutral?

Back (Answer)

they have the same number of protons and electrons and so equal positive and negative charges

#17
Front (Question)

17 What is the fundamental difference between atoms of different elements?

Back (Answer)

they contain different numbers of protons

#18
Front (Question)

18 How does the size of a nucleus compare to the size of the atom?

Back (Answer)

the nucleus is tiny compared to the size of the atom

#19
Front (Question)

19 How many protons are there in an atom with an atomic number of 26?

Back (Answer)

26

#20
Front (Question)

20 How many neutrons are there in an atom with an atomic number of 26 and a mass number of 56?

Back (Answer)

30 (56 - 26) The number of neutrons is the mass number minus the atomic number

#21
Front (Question)

21 Which subatomic particles are found in the nuclei of most atoms?

Back (Answer)

protons and neutrons

#22
Front (Question)

22 What does the atomic number of an atom tell you about its structure?

Back (Answer)

the number of protons in an atom

#23
Front (Question)

23 What does the mass number of an atom equal?

Back (Answer)

the number of protons plus the number of neutrons

#24
Front (Question)

24 What will be the same about atoms of the same element?

Back (Answer)

they will have the same atomic number and same number of protons