What is the chemical formula of titanium(ii)

This is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table.

Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural.question 2 reflects a moral or social value.question 3 refers to something that can be measured.question 4 reflects a question that can’t be observed.

Chemistry worksheet - i am not sure what they are asking for exactly?