Quando um metal alcalino, X, localizado no 3°período da tabela periódica dos elementos se une a um calcogênio, Y, localizado no 2º período forma-se um composto de fórmula . As lacunas podem ser completadas corretamente, respectivamente, com: * a) iônico e XY2. b) metálico, XY. c) iônico e X2Y. d) molecular e XY. e) molecular e XY2.

Which of the following statements concerning the influence of culture on ethnic identity formation is accurate? a. one will reject ethnic identity if cultural stereotypes are encountered. b. if one’s ethnic city is different from the dominant cultural group, then one’s ethnic identity you will become weekend. c. if an the ethnic group is excepted by dominant culture, then ethnic identity formation can be a difficult process. d. similarity to the dominant culture can determine how easy it is for one to except ethnic differences.

All forces cause motion? true or false

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.