Year 8 Science – Periodic Table and Atomic Structure 1
Practise linking properties to uses, the history of atomic models, gas and flame tests, atomic structure calculations and patterns in the periodic table. 20 questions. 25 minutes.
Which property of helium makes it suitable for filling floating balloons?
Which scientist discovered the electron in 1897 using a cathode-ray tube?
Choose the word that completes the blank.
The neutron was discovered in 1932 by 1.
Blank 1: Thomson · Chadwick · Dalton
Circle 1 word in the sentence below.
Click the scientist who pictured atoms as solid, indivisible spheres.
DaltonThomsonRutherfordBohrChadwick
Which resource, mined in the Pilbara region of Western Australia, has helped Australia build a major steel industry?
Element X is in Group 18 of the periodic table. What is it most likely to be?
Choose the word that completes each blank.
Copper is used for electrical wiring because it is a good 1 of electricity and is 2.
Blank 1: conductor · insulator · semiconductor
Blank 2: brittle · magnetic · ductile
Early toolmakers chose bronze rather than pure copper for tools. Why?
Gold is used in jewellery and in electrical contacts. Which property of gold makes it suitable for both?
A student adds magnesium to dilute hydrochloric acid and holds a lit splint at the mouth of the test tube. It gives a squeaky pop. Which gas was produced?
Choose the word that completes each blank.
A glowing splint 1 in oxygen gas, but a lit splint gives a 2 in hydrogen gas.
Blank 1: relights · goes out · turns blue
Blank 2: milky cloud · green flame · squeaky pop
Four salts were tested in a flame test. Which sample contains potassium?
| Sample | Flame colour |
|---|---|
| A | Yellow-orange |
| B | Blue-green |
| C | Lilac |
| D | Red |
In the gold-foil experiment, a very small number of alpha particles bounced straight back. What did this show about the atom?
An atom has 17 protons and 18 neutrons. How many electrons does the neutral atom have?
How many neutrons are in an atom with these numbers?
| Mass number | Atomic number |
|---|---|
| 23 | 11 |
Choose the word that completes the blank.
Chlorine has atomic number 17, so its electron arrangement is 1.
Blank 1: 2,8,7 · 2,8,8 · 2,9,6 · 2,7,8
Choose the number that completes each blank.
An atom with electron arrangement 2,8,1 is in Period 1 and Group 2.
Blank 1: 1 · 3 · 8
Blank 2: 3 · 1 · 8
Mendeleev left gaps in his 1869 periodic table. Why?
Choose the word that completes the blank.
In 1913 Moseley arranged the elements by increasing 1.
Blank 1: atomic number · density · number of neutrons
Circle 2 words in the sentence below.
Click the two elements most likely to be unreactive gases.
neonsodiumargonironcarbon