An atom of an element has 28 innermost electrons and 7 outermost electrons. In which period of the Periodic Table is this element located?

1. 5

2. 2

3. 3

4. 4

How is acid rain harmful for aquatic life?

Elements cannot be seen with the eye. True False

A sample of iron metal absorbs 4.56j of heat, upon which temperature of the sample increased from 29 degrees c to 36 degrees c. Which if the following is the mass of the sample? cs of iron is 0.46j/g degrees.

Which of the following actions will increase the solubility of AgBr in water? a) increasing the pH b) decreasing the pH c) adding NaBr d) adding NaNO³ e) none of the above.

Reactants → products Based on the Law of Conservation of Matter, describe the relationship between the mass of the reactants and the mass of the products.

Which of the following has the greatest first ionization engergy li, be, b or c

If we know that 10.0 cm3 of ice has a mass of 9.19 g what is the density of ice

1. The is the particle in the nucleus of the atom that carries a positive charge and is counted to identify the atomic number. What's the answer

How many grams are there in 5.00 moles of lead Pb?

A large body in space that orbits a star and does not produce light of its own