Year 9 Science – Periodic Table and Atomic Structure 1
Practise reading formulas, working out atomic structure from the numbers, predicting properties from position, and interpreting investigation data and the gold-foil evidence. 20 questions. 25 minutes.
How many atoms in total are in one unit of sodium bicarbonate, NaHCO₃?
Which compound is made of three different elements?
Choose the word that completes each blank.
A compound differs from a mixture because its elements are 1 bonded in a 2 ratio.
Blank 1: chemically · physically · loosely
Blank 2: varying · random · fixed
Two molecules of methane are written 2CH₄. How many hydrogen atoms are there altogether?
Choose the word that completes each blank.
Aluminium is used in aircraft because it is 1 and resists 2.
Blank 1: dense · light · brittle
Blank 2: conduction · melting · corrosion
Bronze, an alloy of copper and tin, is used for ship propellers instead of pure copper. Which property change makes it more suitable?
Cutlery is made from stainless steel rather than pure iron. Which explanation is best?
Choose the word that completes each blank.
Beryllium (2,2) and magnesium (2,8,2) are in the same 1 of the periodic table because their atoms have the same number of 2.
Blank 1: group · period · shell
Blank 2: protons · outer-shell electrons · occupied shells
A neutral atom has mass number 27 and 14 neutrons. What is its electron arrangement?
Circle 1 word in the sentence below.
Click the electron arrangement of a neutral atom with 16 protons.
2,8,52,8,62,8,72,6,8
Choose the number that completes each blank.
Fluorine has atomic number 9 and mass number 19. Its atoms have 1 neutrons and 2 electrons in the outer shell.
Blank 1: 9 · 28 · 10 · 19
Blank 2: 2 · 9 · 7
Element E has electron arrangement 2,8,6. Which set of properties is it most likely to have?
Choose the word that completes each blank.
Argon is unreactive because its outer shell is 1, which means it has 2 outer electrons.
Blank 1: full · half-filled · empty
Blank 2: 2 · 8 · 7
A student compares how well four metals conduct heat. She sticks a wax drop to the end of each rod, heats the other end and times how long the wax takes to fall. Which must be kept the same for every rod?
Which list ranks the metals from best to poorest conductor of heat?
| Metal | Time for wax to fall (s) |
|---|---|
| Copper | 12 |
| Iron | 40 |
| Aluminium | 18 |
| Lead | 55 |
Which element is most likely a non-metal that is a solid at room temperature (25 °C)?
| Element | Appearance | Conducts electricity | Melting point (°C) |
|---|---|---|---|
| W | Shiny | Yes | 1085 |
| X | Dull | No | 113 |
| Y | Shiny | Poorly | 1414 |
| Z | Dull | No | −219 |
A solid piece of element Q fizzes in dilute hydrochloric acid. A lit splint held at the mouth of the test tube gives a squeaky pop. What can be deduced?
Metal X is in Group 1. Which position fits X best?
Choose the word that completes each blank.
Rutherford's gold-foil result showed a small, dense, 1 nucleus, which replaced Thomson's 2 model.
Blank 1: positive · negative · neutral
Blank 2: solid sphere · plum pudding · shell
Thomson's plum pudding model pictured a sphere of positive charge with electrons spread through it. Which observation from the gold-foil experiment could this model not explain?