Answer:
Hydrometers
Density can be measured using a variety of instruments. A hydrometer is used to determine the density
Explanation:
The ans is C. Hydrogen, deuterium amd tritium are all isotopes of hydrogen. Isotopes only differ in their number of neutrons. Hence, the ans is c
The chart is about atomic structure: at the top, the left box is "nucleus" and the right is "electron cloud".
On the left, under nucleus, the two boxes are: "protons" on the right and "neutrons" on the left. Under proton is elements which is given and under neutrons, it is "isotopes".
On the right, under electron cloud, the next box is "electrons" and then the lower box is "ions".
Cotton a thin membrane like skin dye and a liquid that helps absorb things
Answer:
the modals of arrangement for first periodic table was. increasing atomic mass and grouping together of elements having similar properties
