Atoms and Isotopes Flashcards Preview

GSHS AQA C2 Additional Chemistry > Atoms and Isotopes > Flashcards

Flashcards in Atoms and Isotopes Deck (21)
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1
Q

Name the three sub atomic particles

A

Protons, electrons and neutrons

2
Q

What is the mass of a proton?

A

1

3
Q

What is the mass of an electron?

A

Almost zero / very small

4
Q

What is the mass of a neutron?

A

1

5
Q

What is the mass number of an atom?

A

The total number of protons and neutrons in the atom

6
Q

What is the atomic number of an atom?

A

The number of protons (or electrons) in an atom

7
Q

What is the charge on a proton?

A

+1 / positive / +

8
Q

What is the charge on a neutron?

A

0 / zero / no charge

9
Q

What is the charge on an electron?

A

-1 / negative / -

10
Q

What is in the nucleus of an atom?

A

Protons and neutrons

11
Q

Where are the electrons found in an atom?

A

In the shells

12
Q

Sodium has a mass number of 23 and an atomic number of 11. How many protons, neutrons and electrons does it have?

A

11 protons
11 electrons
12 neutrons

13
Q

Carbon has an atomic number of 6. How many electrons does it have and how are they arranged?

A

6 electrons

2 in the first shell, 4 in the second shell (2.4)

14
Q

What name is given to atoms of the same element that have different numbers of neutrons?

A

Isotopes

15
Q

Why do the isotopes carbon-12 and carbon-14 have different mass numbers?

A

Carbon-12 has 6 neutrons and carbon-14 has 8 neutrons (they both have 6 protons and 6 electrons)

16
Q

Why does chlorine have a mass number that is not a whole number, 35.5?

A

The mass number is an average of the isotope mass numbers, taking into account their abundances (amounts).

17
Q

An atom with 3 protons has a mass number of 7. How many neutrons does it have?

A

4

18
Q

An atom has 7 protons, 7 neutrons and 7 electrons. How many of these sub-atomic particles are found in the nucleus?

A

14 (7 protons and 7 neutrons)

19
Q

An atom has 17 protons, 17 electron and 18 neutrons. In the isotope of this element, what will be different?

A

The number of neutrons

20
Q

A particle has 14 protons, 14 electrons and 15 neutrons. Is the particle an atom? Why?

A

Yes it is an atom.

It has the same number of positively charged protons and negatively charged electrons.

21
Q

An atom has 6 electrons. What is the symbol of this element?

A

C