Strips of aluminum and lead will react with hydrochloric acid, but a silver strip will not. A reaction was observed when an Al strip was placed in solution of Pb(NO3)2 and AgNO3. No reaction was
observed when an Ag strip was placed in a Pb(NO3)2 solution. Arrange the metals and hydrogen in
a relative reactive series, listing the most reactive first.

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates

the answer is na (sodium)