Question

CHECKPOINT A. Choose the correct option. 1. The mass number of an atom is 3. Only metals exhibit variable valency. 4. In the periodic table, elements are arra in the increasing order of atomic mas 5. The number of electrons an electron can accommodate is fixed. 6. Hydrogen chloride is formed by to electrons from hydrogen to chlor D. Match the words in the two colu Column Column 1. Rutherford 1. cathode 2. Niels Bohr 11. gold fo 3. Democritus 111. charge a) twice the atomic number b) the mass of the protons and electrons c) the nearest whole number to the atomic mass d the mass of the nucleus 2. The outermost electronic level of an atom is called the a) K shell b) octet shell c) valence shell d) unfilled level 3. If the mass number of an atom is 31, and the atomic number is 15, the number of neutrons is a) 46 b) 15 c) 16 d) 31 4. If the atomic number of an element is 13, its electronic configuration is a) 2, 8, 16 b) 2,18,6 c) 2,8, 3 d) 2, 8, 8 5. If the number of valence electrons in an atom is 7, its valency will be a) 7 b) 1 c) multiple valency d) 6 4. Thomson iv. theor 5. Millikan T fixed E. Define the terms. 1. atomic number 3. isotope F. Short-answer question 1. What are fundament Cimb​

Answer 1

Answer:

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