What is the probibility that a random card is orange or yellow

50 50 chance. Depending on how many other colors there are. If it’s 4 different colors then they will all have a 25% chance.

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.

Element 17 is chlorine it is a group 7 element(halogen) and belongs to period 3 of the periodic table