Question

Answer the following:1. A ________ is a set of elements that run from left to right. 2. Every element in the first period has _______ shell for its _______. Every element in the second period has ______ shells for its ________. How many shells will the third period have? 3. Groups are _______ that run from top to bottom. 4. The elements of a group have the same number of ______ in their ______ shell. 5. Every element in group one has ______ electron in its outer shell. Every element in group two has ______ electrons in its outer shell. 6. The element that can act like it belongs to two groups is _______. Why?

Answer 1

Answer: 1. Periods 2. One, electrons 3. Two, electrons 3. Elements 4. Electrons, outermost 5. One, two 6. Seven, six

Explanation: they needed one and two electrons to complete their outer shell, so the have same valence but negative.

Answer 2

Answer:

. A ____period____ is a set of elements that run from left to right. 2. Every element in the first period has _____one__ shell for its ___electronic configuration structure____. Every element in the second period has ___two___ shells for its ___electronic configuration structure__. How many shells will the third period have? The third period has 3 shells

3. Groups are ____elements___ that run from top to bottom. 4. The elements of a group have the same number of __electron____ in their ___valence___ shell. 5. Every element in group one has ___one___ electron in its outer shell. Every element in group two has ___two___ electrons in its outer shell. 6. The element that can act like it belongs to two groups is _______. Why

xplanation: