Who proposed that the atom had a positivley charged nucleus as its center

Which groups in the main group have a lower electronegativity than D block elements

Which statements describe functions of DNA? Select three options.

A sample of dolomitic limestone containing only caco3 and mgco3 was analyzed. a. when a 0.2800 gram sample of this limestone was decomposed by heating, 75.0 milliliters of co2 at 750 mmhg and 20 degrees celcius were evovled.

The rate of a reaction can be observed by measuring the change in the amount of a reactant over time, as given in the graph below. How does the rate of a reaction change with time and how does the collision theory explain this change?

The process of passing electricity through water to chemically separate it into hydrogen and oxygen is called

Which of the following is the correct name for the compound hgs? mercury sulfide mercury (i) sulfide mercury (ii) sulfide mercury monosulfide?

Which of these has the most impact on the apparent brightness of a star seen from Earth? Gravitational pull, temperature of star, distance from earth, earths orbital pattern

What are 6 abiotic factos from finding nemo?

Which of the following is an element? a. carbon monoxide gas (co) b. magnesium chloride salt (mgcl) c. hydrochloric acid (hcl) d. zinc metal (zn)

Describe the formation of an aqueous KI solution when KI dissolves in water