1) Which of the following does the nucleus contain? a) protons and electrons b) protons and neutrons c) neutrons and electrons 2) Which of the following statements is correct? a) Protons have a positive charge and neutrons are negative b) Protons have a negative charge and electrons are positive c) Protons have a positive charge and electrons are negative 3) What is the atomic number? a) The number of atoms it contains b) The number of protons it contains c) The number of neutrons it contains 4) In an atom: a) number of protons = number of electrons b) number of protons = number of neutrons c) number of neutrons = number of electrons 5) A neutron has what charge? a) no charge b) positive c) negative 6) How many energy levels are there? a) 1 b) 7 c) 6 7) What is the mass number? a) no of protons b) no of neurtons c) sum of protons and neutrons 8) what is the atomic number? a) no of protons b) no of electrons c) no of protons or electrons 9) The mass of atom concentrated in a) protons b) electrons c) nuculeus 10) The nucleus of hydrogen atom doesn't contain neutrons a) The atomic no. = the mass no b) it become solid c) it become another element d) 11) When the number of proton changes so a) only atomic no. change b) only mass no. change c) Atomic no. and mass no. changes 12) The atom is electrically neutral in ordinary state due to a) no. of electrons b) no. of protons c) The number of –ve electrons = the number of +ve protons

Atomic structure quiz

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