What are the 3 main classes of elements?

Many sponges can reproduce asexually. Ladybugs, on the other hand, reproduce sexually. When small bits of a sponge are broken off-often by currents or by predators--they can float to new regions and regenerate as new sponges.

Which of the following is a reasonable ground-state electron configuration? 1s^21p^62s^22p^63s^2 1s^22s^22p^63s^23p^64s^24d^8 1s^22s^22p^63p^6 1s^22s^22p^63s^1

Calculate the percent composition of the compound that forms when 222.6 g N combines completely with 77.4 g 0. calculate to the nearest tenth of a percent.

Where would you expect clouds and precipitation to form in each type of occluded front?

Ca + H2SO4 single replacement

Balance the following oxidation-reduction reaction: Fe (s) + Na + (aq) →Fe2 + (aq) + Na (s) Express the coefficients as integers separated by commas (e. g., 4,1,3,2, where 1 indicates the absence of a coefficient).

What are the three sub-types of convergent plate boundaries

Which phrase describes an atom

How many moles of NH3 are in 0.250 L of a 5.00 M aqueous solution?

There are different types of bonds based on electronegativity. One bond type is known as non-polar covalent. Which choice below has this bond type? A. all of the compounds B. H2 C. H2O D. NaCl