Answer:
option c
Explanation:
neutros equal to mass num - atomic num
Answer:
So, in general, atomic radius decreases across a period and increases down a group. Across a period, effective nuclear charge increases as electron shielding remains constant.
Explanation:
Moving from left to right across a period, the atomic radius decreases. The nucleus of the atom gains protons moving from left to right, increasing the positive charge of the nucleus and increasing the attractive force of the nucleus upon the electrons.
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Answer:
4.43 mol
Explanation:
PV = nRT => n = PV/RT = (1 atm)(99.2L)/(0.08206 L Atm/mol K)(273K)= 4.43 mol
Answer:
825.5 mm
Explanation:
850 mm is the total pressure of the two gases....subtract the water vapor pressure and the remainder is due to the oxygen
850-24.5 = 825.5 mm
