Oquizy

How many covalent bonds are formed in a methane molecule (CH₄)?

2 3 4 5

Brass is harder than pure copper. Which statement best explains why?

Brass contains only small atoms Brass has stronger bonds between atoms Brass is a compound The different-sized atoms in brass distort the layers

Which of the following correctly describes the structure of poly(ethene)?

Ionic lattice of repeating ions Lattice of positive ions in a sea of electrons Long chains of covalently bonded atoms Simple molecules held by weak forces

Which pair of elements is most likely to form an ionic compound that exists as a solid at room temperature (RTP)?

Aluminium and chlorine Carbon and oxygen Hydrogen and fluorine Sodium and hydrogen

Which of the following substances contains only covalent bonds in its entire structure?

Magnesium chloride Silicon dioxide Sodium Water

Which statement best explains why alloys are harder than pure metals?

Alloys contain more protons than metals Alloys have more electrons The atoms are arranged in a perfect pattern The atoms are of different sizes, making it harder for layers to slide

Quiz: Chemistry - Chemical Bonding