Nguyên tử X có tổng số hạt là 43.biết trong hạt không mang điện nhiều hơn số hạt mang điện là 1

write in english bro i cant understand your language :)

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation:

b.false that your answer