1) Which option show an increasing order of size? a) atom, cell, organism, organ system b) molecule, organelle, tissue, organism c) organelle, molecule, tissue, organ system d) cell, atom, tissue, organ system 2) Which sub-atomic particles are found in the nucleus of an atom? a) electron b) neutron c) proton 3) How can we describe the location of the electron in an atom? a) In the nucleus b) Around the nucleus c) In electron shells d) Outside electron shells 4) What is the relative mass of a neutron? a) 1 b) 1+ c) 1− d) 0 5) What is the relative mass of an electron? a) 1/184 b) 1 c) 1/1840 d) 0 6) Which sub-atomic particles have a relative charge? a) electron b) neutron c) proton 7) Where are the negative charges located in an atom? a) In the nucleus b) Around the nucleus 8) Which sub-atomic particles contribute to the mass of the atom? a) electron b) neutron c) proton 9) Atoms are always electrically neutral. Why is this so? a) Atoms have neutrons with no relative charge. b) Atoms have the same number of electrons and protons. c) Atoms have the same number of protons and neutrons. d) Protons are located in the nucleus and electrons are located in the electron shells. 10) An unknown particle has 8 protons, 8 neutrons and 10 electrons. Use the Periodic Table at the back of your notes to identify the element and state if the particle is an atom. a) neon, atom b) neon, not an atom c) oxygen, atom d) oxygen, not an atom 11) Particle X has 4 protons, 3 neutrons and 4 electrons. Particle Y has 9 protons, 10 neutrons and 10 electrons. Which particle is an atom? a) X b) Y

[A-C] Atoms, Size of Atom, Atomic Structure

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