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Grade 8 Periodic Table and Elements
Grade 8 Reactions
When any atom emits one alpha particle, the
  1. atomic number is changed by 2 units, but the atomic mass remains unchanged.
  2. atomic mass is changed by 2 units, but the atomic number remains unchanged.
  3. atomic number is decreased by 2 units, and the atomic mass is decreased by 4 units.
  4. atomic mass is decreased by 2 units, and the atomic number is decreased by 4 units.
Grade 10 Periodic Table and Elements
Grade 8 Periodic Table and Elements
Grade 8 Atomic Structure
Why does the proton determine the identity of an atom?
  1. The number of protons is also the atomic mass.
  2. The number of protons determines chemical properties, such as reactivity.
  3. The number of protons in an atom's nucleus determines an atom's atomic number.
  4. The number of protons decides an atom's name.
Grade 10 Bonds and Mixing
In ionic bonds, which of the following is true?
  1. Electrons are shared unequally between atoms.
  2. Electrons are shared equally between atoms.
  3. Neutrons are transferred between atoms.
  4. Electrons are transferred between atoms.
Grade 6 Molecules and Compounds
Which of the following statements is true?
  1. Atoms are made of molecules.
  2. Atoms contain more than one element.
  3. Some atoms do not have protons.
  4. Atoms can join to form molecules.
Grade 10 Periodic Table and Elements
Grade 7 Periodic Table and Elements
The Periodic Table contains all of the following except
  1. atomic number.
  2. chemical symbol.
  3. atomic mass.
  4. chemical formula.
Grade 11 Stoichiometry
Dividing a number by 22.4 converts between which two units?
  1. moles to liters
  2. mass to atoms
  3. liters to moles
  4. atoms to mass
Grade 6 Periodic Table and Elements
What 2 things do the numbers inside the box of an element on the Periodic Table of Elements represent?
  1. How popular the element is
  2. How often it is used
  3. The atomic number
  4. The hardness of the element
  5. The atomic mass
  6. The atomic range
Grade 6 Molecules and Compounds
Compounds are pure substances made of
  1. two or more kinds of atoms.
  2. two of the same type of atom.
  3. more than 5 types of atoms.
  4. mixtures.
Grade 9 Atomic Structure
Number of protons is called the                     .
  1. atomic number
  2. atomic mass
  3. mass of the nucleous
  4. mass of the element
Grade 6 Periodic Table and Elements
Grade 10 Periodic Table and Elements
Grade 6 Molecules and Compounds
What is true about atoms and molecules?
  1. Molecules may combine to form atoms.
  2. Atoms and molecules repel each other.
  3. Atoms may combine to form molecules.
  4. Molecules and atoms attract each other.
Grade 10 Periodic Table and Elements
What is shown above the element symbol on the periodic table?
  1. atomic mass
  2. element name
  3. atomic number
  4. number of isotopes
Grade 9 Periodic Table and Elements
What is the sum of the number of protons and the number of neutrons in an atom called?
  1. atomic number
  2. atomic mass
  3. mass number
  4. none of the above
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