1,3,2,2 would be the coefficients from left to right
Answer:
C, increases/decreases
Explanation:
As you move down a group on the periodic table, the electronegativity of an element decreases because the increased number of energy levels puts the outer electrons very far away from the pull of the nucleus.
Answer:
(A) Mixture; physical; (B) compound; chemical; (C) mixture; physical
Explanation:
(A) Orange liquid
Mixture — Red solid dissolved in yellow liquid gives orange solution
Physical change — separated by distillation with no change to the substances
(B) Crystalline solid
Compound — decomposition converts a substance into two or more different substances with different properties.
Chemical change — new substances formed.
(C) Cup of tea
Mixture — sugar is dissolved in the tea
Physical change — the tea and sugar retain their original properties.
Answer: D) covalent bonds are stronger than ionic bonds
Answer:
Mixtures are not chemically united, so they can be divided using physical methods.
Sand is a mixture. (Because different rocks have different chemical compositions.)
Explanation: