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S3 Exp Science Chem Bridging 2024 #02
Quiz by Boh Peng
Tag the questions with any skills you have. Your dashboard will track each student's mastery of each skill.
Bromine is a liquid at 20 °C.
What is the melting point and boiling point for bromine?
A
B
C
D
An atom of potassium is represented as K.
Which row shows the number of protons, neutrons and electrons in the atom?
A
B
C
D
Bromine is a liquid at 20 °C.
What is the melting point and boiling point for bromine?
An atom of potassium is represented as K.
Which row shows the number of protons, neutrons and electrons in the atom?
Sodium chloride is an ionic compound.
Which statement about sodium chloride is not correct?
Iron(III) sulfate is composed of Fe3+ and SO42–ions.
Which values of x and y in Fex(SO4)ygive the correct formula of iron(III) sulfate?
Which diagram shows the arrangement of the atoms in stainless steel?
Four elements have the following electronic configurations.
W 2.8.1
X 2.8.2
Y 2.8.5
Z 2.8.8
Which statement is correct?
The diagrams represent different arrangement of atoms.
Which diagram represents an alloy?
The nucleon number of an isotope of bromine is 81.
How many protons, neutrons and electrons are present in an atom of this isotope?
Why does molten sodium chloride conduct electricity?
An element X forms an ion X3–.
Which group of the Periodic Table is this element found in?
Which substance represents a metal?
The diagrams show the electronic structures of four elements.
Which elements are metals?
The particles in substance Zare widely spaced and able to move freely.
Z changes to state in which the particles are in contact but still able to move freely.
What is this change called?
The nucleon number and proton number of an atom of X and an atom of Y are shown.
Which statement about X and Y is correct?
The electronic structures of two atoms X and Y are shown.
X and Y combine together to form a compound.
Which row describes the type of bonding and the formula of the compound?
Ethane, C2H6,and ammonia, NH3, are covalent compounds.
The dot and cross diagrams of these compounds are shown.
Which statements are correct?
1 A molecule of ethane contains twice as many hydrogen atoms as a molecule of ammonia.
2 An uncombined nitrogen atom has five outer electrons.
3 In a molecule of ethane, the bond between the carbon atoms is formed by sharing two electrons, one from each carbon atom.
The table gives data about four substances.
In which substance are the particles arranged randomly at room temperature?
Which property represents those of an ionic compound?
