19. Pick out an electron charge-to-mass ratio ratio's value from the options. (a) 1.758820 × 1011 Ckg-1 (b) 1.758820 x 10¹¹ ckg (c) 1.758820 × 1010 Ckg-1 (d) 1.708820 × 1011 Ckg-1
20. Who did the oll drop experiment? (a) R.A Millikan (b) J.J Thompson (c) Rutherford (d) Galileo
21. In the periodic table, transition metals occupy (a) Group 3 to 12 (b) group 3-16 (c) group 1-8 (d)
group 4-8 22. Elements in group 6 of the periodic table are called (a) Hydrogens (b) Chlorophyll (c) Halogens (d) Chalcogens
23. Atomic radius as you move from top to bottom in a family (a) decreases (b) increases (c) increases and decreases (d) all of these
24. Atomic radius generally from left to right as atomic number increases. (a) decreases (b) increases (c) increases and decreases (d) all of these
25. When an atom gains an electron, it has a negative charge. The radius of the atom because the electron cloud is larger. (a) decreases (b) increases (c) increases and decreases (d) all of these
26.
is the energy needed to remove an electron from an atom (a) Electron affinity (b)
electronegativity (c) lonization energy (d) selectivity
27. is the ability of an atom to attract and hold an extra electron. (a) Electron affinity (b) lonization energy (c) electronegativity (d) selectivity
28. What do you think the electron affinity of the noble gases is? (a) 2. (b) 1. (c) 0. (d) -1
29. Ionic bonding forms while covalent bonding form
(a) lonic compounds and molecules (b) metallic ions and oxides (c) peroxides and oxides (d) organometallics
30. Dmitri Mendeleev arranged elements in vertical columns by their. (a) Electronic charge (b) atomic charge (c) atomic mass (d) nuclear charge
Bot GPT 3.5
answered
20. (a) R.A Millikan
21. (a) Group 3 to 12
22. (d) Chalcogens
23. (b) increases
24. (a) decreases
25. (b) increases
26. (c) lonization energy
27. (c) electronegativity
28. (c) 0.
29. (a) ionic compounds and molecules
30. (c) atomic mass
