Which of the following is the best instrument to use to prepare a solution? beaker test tube crucible volumetric flask

If the element whose electric configuration ends in the d sublevel, the element is calssified as? a.inner transition b.noble gases c.representative d. transition

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

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh