Elements $X, Y, Z$ $X, Y, Z$ are placed in the same Period of the Periodic Table. $Z$ $Z$ is a smaller atom than $Y$ $Y$ , which is a smaller atom than $X$ $X$ . Which element has the LOWEST atomic number?

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Elements $X, Y, Z$ $X, Y, Z$ are placed in the same Period of the Periodic Table. $Z$ $Z$ is a smaller atom than $Y$ $Y$ , which is a smaller atom than $X$ $X$ . Which element has the LOWEST atomic number?

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Answer 1 · 2015-12-04T16:35:52

Element $X$ $X$ .

Explanation:

Atomic size increases down a Group of the Periodic Table; but decreases across a Period. Why? Because the nuclear charge increases across the Period, while electrons are added to the same shell.

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Elements $X, Y, Z$ $X, Y, Z$ are placed in the same Period of the Periodic Table. $Z$ $Z$ is a smaller atom than $Y$ $Y$ , which is a smaller atom than $X$ $X$ . Which element has the LOWEST atomic number?

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Elements X, Y, ZX,Y,ZX, Y, Z are placed in the same Period of the Periodic Table. ZZZ is a smaller atom than YYY, which is a smaller atom than XXX. Which element has the LOWEST atomic number?

1 Answer

Explanation:

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Elements $X, Y, Z$ $X, Y, Z$ are placed in the same Period of the Periodic Table. $Z$ $Z$ is a smaller atom than $Y$ $Y$ , which is a smaller atom than $X$ $X$ . Which element has the LOWEST atomic number?