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Grade 12 Periodic Table and Elements
Grade 7 Periodic Table and Elements
Grade 10 Properties of Matter
Measurement of molar volumes of various gases show that the molar volume                                            .
  1. tends to decrease with increasing atomicity
  2. tends to increase with increasing atomicity
  3. is totally independent of atomicity
  4. is proportional to the atomicity
Grade 8 Periodic Table and Elements
Which element has 4 neutrons?
  1. an element with an atomic number of 2 and an atomic mass of 4
  2. an element with an atomic number of 3 and an atomic mass of 7
  3. an element with an atomic number of 4 and an atomic mass of 9
  4. an element with an atomic number of 7 and an atomic mass of 14
Grade 8 Properties of Matter
Matter is made up of small particles. Which of the following correctly lists the particles of matter from the SMALLEST to the LARGEST?
  1. cells, molecules, atoms
  2. atoms, cells, molecules
  3. molecules, atoms, cells
  4. atoms, molecules, cells
Grade 9 Quantum Physics and the Atom
Which of the following would be an isotope of aluminum?
  1. Atom A: mass number=24, atomic number=13
  2. Atom B: mass number=24, atomic number=12
  3. Atom C: mass number=26, atomic number=14
  4. Atom D: mass number=22, atomic number=11
Grade 10 Stoichiometry
How many atoms are in 3 moles of H2O?
  1. 18 atoms
  2. 6.02×1023 atoms
  3. 1.8×1024 atoms
  4. 1800 atoms
Grade 12 Physics
What is a neutral atom?
  1. An atom with a positive charge
  2. An atom with a negative charge
  3. An atom with no overall charge
  4. An atom with both positive and negative charges
Grade 9 Atomic Structure
                is equal to the number of protons and the number of neutrons.
  1. Atomic number
  2. Ionic number
  3. Covalent number
  4. Atomic Mass
  5. Atoms
Grade 6 Atomic Structure
Grade 10 Bonds and Mixing
How are bonds formed?
  1. By the attraction between the electrons of two atoms.
  2. By the attraction between the nuclei of two atoms.
  3. By the attraction between the nucleus of an atom and the electrons of another atom.
  4. By the attraction between the electrons of one atom and the neutrons of another atom.
Grade 12 Physics
In Lewis structure, a covalent bond is represented by                                 .
  1. an arrow towards the atom
  2. an arrow away from the atom
  3. a straight line between the atoms
  4. A dotted line between the atoms
College Cell Structure and Function
The order of the following items from largest to smallest is
  1. atom, proton, molecule, organelle
  2. organelle, molecule, atom, proton
  3. proton, atom, molecule, organelle
  4. molecule, atom, proton, organelle
Grade 11 Stoichiometry
The unit "grams" is used in which conversions?
  1. mass to mole, mole to mass
  2. volume to mole, mole to volume
  3. atoms to mole, mole to atoms
  4. volume to atoms, atoms to volume
Grade 11 Bonds and Mixing
Valence electrons are best described in chemistry as
  1. positive electrons in the atom.
  2. all of the electrons in the atom.
  3. the outer shell electrons in the atom.
  4. the number of electrons the atom needs to be stable.
Grade 7 Periodic Table and Elements
The atoms of elements in Group 17 of the periodic table are very reactive. Which of the following best describes the energy transfers that happen with the elements in this group?
  1. The more easily an atom loses an electron, the less energy the atom releases.
  2. The more easily an atom gains an electron, the less energy the atom releases.
  3. The more easily an atom loses an electron, the more energy the atom releases.
  4. The more easily an atom gains an electron, the more energy the atom releases.
Grade 10 Periodic Table and Elements
Carbon-13 is an                 of carbon.
  1. atomic number
  2. atomic mass
  3. allotrope
  4. isotope
Grade 8 Periodic Table and Elements
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