Neutrons are _______________ particles.
  • negative
  • positive
  • neutral
  • cows
The positive particles of an atom are called ___________.
  • electrons
  • atoms
  • neutrons
  • protons
The smallest part of an element is known as the
  • Periodic Table
  • Atom
  • Group
  • Period
Which term defines a substance that is formed by the combination of elements using fixed amounts?
  • atom
  • compund
  • element
  • molecule
Which term defines any substance that cannot be broken down into a simpler substance?
  • atom
  • molecule
  • element
  • compound
What are the basic building blocks for all matter?
  • atoms
  • elements
  • compounds
  • chemicals
What do we call a chemical substance made up of 2 or more different types atoms bonded together?
  • formula
  • atom
  • subscript
  • compound
Which of these items is made up of one or more molecules?
  • Gold
  • Hydrogen
  • Salt
  • Neon
Which of the following statements is not true about an atom?
  • Atoms are always neutral in nature
  • Atoms are not able to exist independently
  • Atoms are the basic units from which molecules and ions are formed
  • Atoms aggregate in large numbers to form the matter that we can see, feel or touch
The chemical symbol for nitrogen gas is
  • ni
  • N2
  • N
  • NI
molecular formula of copper and bromine is
  • CuBr2
  • CUBR
  • Cu2Br
  • CuBr
Atomic number of oxygen is
  • 4
  • 6
  • 8
  • 12
valency of helium is
  • 0
  • 3
  • 2
  • 1
chemical formula of aluminium and hydrogen is
  • aLoH
  • Al(OH)3
  • AL(OH)2
  • AloH
Molecular mass is defined as the:
  • Mass of one molecule of any substance compared with the mass of one atom of C – 12
  • Mass of one atom compared with the mass of one atom of hydrogen
  • Mass of one atom compared with the mass of one molecule
  • none of these
Atomic mass of sodium is
  • 13
  • 23
  • 21
  • 19
Which of the following represents a correct chemical formula?
  • BiPO4
  • NaSO4
  • NaS
  • CaCl
to create a chemical formal you need to know
  • the atomic mass of an element
  • the mass of an element
  • valency of an element
  • all of these
When you heat matter, what happens to the atoms and molecules?
  • they move faster
  • they move slower
  • they stop moving
  • they stay the same
Atomicity is ......
  • the number of atoms present in an element.
  • the number of atoms present in a molecule.
  • atomic mass
  • none of the above
0 h : 0 m : 1 s

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