Chemistry (12th Edition)

Published by Prentice Hall
ISBN 10: 0132525763
ISBN 13: 978-0-13252-576-3

Chapter 9 - Chemical Names and Formulas - 9 Assessment: 123

Answer

This is because when Groups 1A and 2A become like noble gases, they lose electrons and the nucleus gets stronger making the radius smaller. For Group 7A, they gain an electron making the atom bigger.

Work Step by Step

This is because when Groups 1A and 2A become like noble gases, they lose electrons and the nucleus gets stronger making the radius smaller. For Group 7A, they gain an electron making the atom bigger.
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