GCSE Chemistry Exam Prep with Question Papers and Marking Schemes Bundle

Very few atoms of the element tennessine (Ts) have ever been identified. The atomic number of tennessine is 117 Predict the number of outer shell electrons in an atom of tennessine. Give one reason for your answer. Use the periodic table. Tennessine was first identified by a small group of scie...

This question is about oxygen. Scientists think that there was little or no oxygen in the Earth’s early atmosphere. . 1 0 1 Which planet today has an atmosphere that is similar to the Earth’s early atmosphere? Which is the approximate percentage of oxygen in the Earth’s atmosphere toda...

A student investigated the rate of the reaction between zinc and sulfuric acid. Hydrogen gas is produced during this reaction. This is the method used. 1. Add 50 cm3 of sulfuric acid to a conical flask. 2. Add 2.0 g of zinc to the conical flask. 3. Quickly put a stopper in the conical flask and...

What is the number of protons and the number of neutrons in the beryllium atom? Number of protons Number of neutrons What is the relative charge on a beryllium ion? What state of matter is represented by state C in Figure 3? What is the name of the process when state B changes into state A?...

This question is about carbon dioxide. Carbon dioxide is soluble in water and forms an acidic solution. Name an indicator that could be used to test if the solution is acidic. Give the result of the test. How does the solubility of carbon dioxide change as the temperature of the water incre...

What is crude oil formed from? What type of substance is crude oil? The hydrocarbons in crude oil are separated into fractions using fractional distillation. Complete the sentences. Choose answers from the box. In fractional distillation the crude oil is heated so the hydrocarbons The fract...

In a chromatography experiment, a blue colour moved 4.77 cm. The solvent moved 5.30 cm. Calculate the Rf value for the blue colour. Black ink is a mixture of several colours. Plan an experiment using paper chromatography to: • separate the colours in black ink Crude oil is a mixture of m...

a neutron and a proton 1 AO1 4.1.1.5 01.3 (nitrogen) 2 / two (oxygen) 1 / one 1 1 AO2 4.1.1.1 lithium allow Li 1 AO2 4.1.1.1 alkaline 1 AO1 4.4.2.4 pipette 1 AO1 4.4.2.5 RPA2 burette 1 AO1 4.4.2.5 RPA2 any one from: • (hydrochloric acid) not added drop by drop • did not sw...

ball of positive charge with (negative) electrons embedded do not accept references to protons, nuclei, neutrons 1 1 AO1 4.1.1.3 (earliest) electrons protons (latest) neutrons 1 AO1 4.1.1.3 (number of outer shell electrons) 7 (reason) (tennessine is in) Group 7 allow th...

Mars 1 AO1 4.9.1.2 20% 1 AO1 and plants evolved photosynthesis took place 1 1 AO1 4.9.1.39.1.1 (y-axis labelled) 5, 10, 15, (20) oxygen bar drawn to 16% allow (y-axis labelled) 4, 8, 12, 16, (20) ignore correct intermediate values allow a tolerance of ± 1⁄2 a small squa...

use a lower temperature use sulfuric acid of a lower concentration 1 1 AO1 4.6.1.2 RPA5 (test) burning / lit splint (result) burns with a (squeaky) pop sound MP2 is dependent upon MP1 being awarded allow flame do not accept glowing splint allow pops 1 1 AO1 4.8.2all ...

(number of protons) 4 (number of neutrons) 5 1 1 AO2 5.1.1.4 5.1.1.5 copper did not react (with zinc sulfate) or copper is less reactive (than zinc) allow copper is less reactive (than magnesium) 1 AO3 5.4.1.2 5.5.1.1 RPA10 potassium (atoms) lose electrons chlorine (atoms) gain...

Level 3: The method would lead to the production of a valid outcome. All key steps are identified and logically sequenced. 5–6 AO3 5.3.1.3 5.4.2.2 Level 2: The method would not necessarily lead to a valid outcome. Most steps are identified, but the plan is not fully logically sequenced....

heat until the mass of the evaporating basin and contents does not change use 25 cm3 of water for each experiment 1 1 AO3 5.10.1.2 RPA13 Level 2: Scientifically relevant features are identified; the way(s) in which they are similar / different is made clear and (where appropriate) th...