GCSE EDEXCEL TRIPLE SCIENCE CHEMISTRY PAPER 2 2024 QUESTION PAPER WITH QUESTIONS AND CORRCT ANSWERS GRADED A+
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GCSE EDEXCEL TRIPLE SCIENCE CHEMISTRY PAPER 2 20
Institution
GCSE EDEXCEL TRIPLE SCIENCE CHEMISTRY PAPER 2 20
GCSE EDEXCEL TRIPLE
SCIENCE CHEMISTRY PAPER 2
2024 QUESTION PAPER WITH
QUESTIONS AND CORRCT
ANSWERS GRADED A+
What is in the nucleus? - CORRECT ANSWER-Protons and neutrons
What is relative atomic mass? - CORRECT ANSWER-Relative atomic
mass is an average mass taking into account the diff...
GCSE EDEXCEL TRIPLE
SCIENCE CHEMISTRY PAPER 2
2024 QUESTION PAPER WITH
QUESTIONS AND CORRCT
ANSWERS GRADED A+
,What is in the nucleus? - CORRECT ANSWER-Protons and neutrons
What is relative atomic mass? - CORRECT ANSWER-Relative atomic
mass is an average mass taking into account the different masses
and abundances of all the isotopes that make up the element
How do you calculate the relative atomic mass? - CORRECT
ANSWER-Sum of (isotope abundance x isotope mass number) /
sum of abundances of all the isotopes
What are compounds? - CORRECT ANSWER-Substances formed
from two or more elements, the atoms of each are in fixed
proportions throughout the compound, and they're held together by
chemical bonds
What is ionic bonding? - CORRECT ANSWER-A compound formed
through bonding between a metal and non-metal (consists of ions).
The metals become positive as they lose electrons, and the non-
metals become negative as they lose electrons. E.g. the metal gives
an electron to a chlorine atom. The oppositely charged ions are
attracted to each other by electrostatic forces
What are five properties of ionic compounds? - CORRECT ANSWER-
High melting points
High boiling points (due to the strong bonds between the ions)
Cannot conduct electricity in solid form
,Conduct electricity in molten form as the ions are free to move
Dissolve easily in water
What is covalent bonding? - CORRECT ANSWER-A compound
formed from non-metals consists of molecules. Each atom shares
an electron with another atom.
Give an example of an ionic compound - CORRECT ANSWER-NaCl
(Sodium chloride)
Give an example of a compound that is covalently bonded -
CORRECT ANSWER-HCl (Hydrogen chloride)
What are 5 features of simple molecular structures? - CORRECT
ANSWER-Weak intermolecular forces
Low melting points
Low boiling points
Melting and boiling points increase as the molecules get bigger
Don't conduct electricity
What is the formula for carbon dioxide? - CORRECT ANSWER-CO2
What is the formula for ammonia? - CORRECT ANSWER-NH3
, What is the formula for water? - CORRECT ANSWER-H2O
What is the formula for sodium chloride? - CORRECT ANSWER-NaCl
What is the formula for carbon monoxide? - CORRECT ANSWER-CO
What is the formula for hydrochloric acid? - CORRECT ANSWER-HCl
What is the formula for calcium chloride? - CORRECT ANSWER-
CaCl2
What is the formula for sodium carbonate? - CORRECT ANSWER-
Na2CO3
What is the formula for sulfuric acid? - CORRECT ANSWER-H2SO4
What are mixtures? - CORRECT ANSWER-Two or more elements not
chemically bonded together
Give five methods of separating mixtures - CORRECT ANSWER-
Filtration
Crystallisation
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