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Which of these pairs of elements have the same number of valence electrons? a. phosphorus (p) and chlorine (cl) b. berylium (be) and calcium (ca) c. chlorine (cl) and helium (he) d. oxygen (o) and carbon (c)
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In saturated organic compounds, all the bonds between carbon atoms are called?
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Compare and contrast physical changes with chemical changes.
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Balance and in which category does it fit in? single or double displacement or synthesis or decomposition? (a) k2 o → k + o2 (b) na + i2 → nai (c) cu(no3 )2 + naoh → cu(oh)2 + nano3 (d) kclo3 → kcl + o2 (e) ca(no3 )2 + hbr → cabr2 + hno3 (f) sn(oh)2 → sno + h2 o (g) p4 + n2 o → p4 o6 + n2 (h) fe + al2 (so4 )3 → feso4 + al (i) alcl3 + na2 co3 → al2 (co3 )3 + nacl (j) c3 h6 + o2 → co2 + h2 o
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Which of these pairs of elements have the same number of valence electrons? a. phosphorus (p) and c...
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