Calcula el número de protones, de electrones y de neutrones que posee un átomo de calcio, cuyo número atómico es 29 y cuyo número mastico es 40

The clouds are grey and ground is wet. a quantitative b qualitative

Which statement is true about hcl? (5 points) select one: a. it is a salt because it increases the concentration of metallic ions. b. it is a salt because it is formed by the reaction of an acid and a base. c. it is an acid because it increases the concentration of hydroxyl ions. d. it is an acid because it increases the concentration of hydronium ions.

Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.