GRADE 9 SCIENCE

These atoms easily pick up electrons so they form negative ions (-3, -2 or -1) since there are more electrons with a negative charge than protons with a positive charge. The more electrons on the outer ring, the easier it is for them to pick up extras so non-metals in group 7 (17) are more reactive than in group 6 (16) or 5 (15). ................
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