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WorksheetsPre-test: Chemical Formula of Common Substances
Total questions: 15
Worksheet time: 11mins
The molecule serotonin contains (a) hydrogen atoms.
An emipirical formula represents:
the 3D structure of the molecule
a small whole-number ratio among the atoms
the actual number of atoms in 3D array
the crystal structure made up of different atoms
These are elements that naturally exist as diatomic molecules.
atomic elements
monatomic elements
molecular elements
molecular compounds
These are substances formed from two or more non-metallic elements that are held together by a covalent bond.
Molecular compounds
Ionic compounds
Inorganic compounds
Organic compounds
What do you call the particles that make up a molecular compound?
(a)
Formula units are the particles of matter that make up:
Molecular compounds
Atomic elements
Ionic compounds
Molecular elements
It is a notation that uses atomic symbols and numerical subscripts to show the number and type of atoms present in a molecule/formula unit.
(a)
What is the chemical formula of a compound made up of two hydrogen atoms, one sulfur atom, and four oxygen atoms.
(a)
In the periodic table of elements, the metallic elements are found in:
The left side of the metalloids
The right side of the metalloids
On top of the metalloids
At the bottom of the metalloids
The image above shows the _________ of methane molecule.
Structural formula
Ball-and-stick model
Space-filling model
Molecular formual
It is the chemical formula that shows the actual number of atoms of each element in a molecule.
(a)
In writing chemical formulas, we:
list the most non-metallic element first
list the most metallic element first
list them alphabetically
list in terms of the ratio of the elements present in the compound
It is the kind of formula used by chemists to picture out molecules by showing the bonding between atoms using either lines or electron-dot formula.
Ball-and-stick model
Space-filling model
Structural formula
Chemical formula
A flashlight is projected on two different mixtures as shown in the image above. Which of the mixtures is a solution?
A
B
None of the above
Both are solutions
In which type of mixture is muddy water classified?
Solution
Colloid
Suspension
