Which is larger n3 or f

Thus, helium is the smallest element, and francium is the largest. An oxygen atom has more mass weight than a carbon atom because it has more protons and neutrons. Atoms are made up of protons and neutrons, which are heavy, and electrons, which are very light.

S2- is larger than O- because S2- has more protons and thus a stronger pull on its electrons than O- does, so it has a smaller atomic radius. Atomic radii of oxygen is 48 pm. In moving from left to right across a period, the atomic radius decreases as the effective nuclear charge increases. Hence, fluorine has smaller atomic radius than oxygen. Explanation: From top to bottom of the periodic table ions will increase in radii.

However, now left to right the radius is more of a function of the number of electrons. Br — will have the largest atomic size because Br- has one extra electron in its valence shell which due to its unbalanced negative charge will be repelled and hence the atomic radius of Br- will increase. The difference, however, should be quite small. So ,there would be less nuclear force to bind it compared to Magnesium whose atomic number is It has 2 electrons in last shell.

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Flashcards » Chemistry Test 2 - Ch 8 - Add to Folders Close. Please sign in to add to folders. Upgrade to Cram Premium Close. Upgrade Cancel. Shuffle Toggle On. Card Range To Study through. What is isoelectronic? Which elements are noble gases? We use their symbols. Electron Config - ions derived from Representative elements.

Effective Nuclear Charge. Left to right, number of core e- 91s2 remains constant, while nuclear charge increases. The added Val e- at each step is more strongly attached by the nucleus than the one before. Size of the species decreases with increasing protons. N has minimum 7 protons and Ne 10 protons.

So nitrogen ion has greater size than neon. N3- is bigger than O2-, but it also has more charge. Because N3- has only 7 protons and F- has 9, smaller attraction exerted by the nucleus on the e- results in a larger N3- ion. S2- is the largest in size. S2- and Cl- have an extra shell than the other two and thus the two largest ions of the four.