When Mendeleyev changed the layout, there were gaps where no known element fit.
How did the gaps help scientists look for
undiscovered elements? Those are the answers in the picture:)

Select the correct answer how does the heat content of the reaction change in the process of photosynthesis when a glucose molecule is formed? ca the value of is negative the value of qis positive the value of a remains constant the value of a decreases the value of equals zero e

What’s the scientific notation for the number 6,840,000,000

How many atoms of mg are present in 97.22 grams of mg? 6.022 × 1023 2.408 × 1024 4.818 × 1024 5.855 × 1025