The alkali metals are those in the leftmost column on the periodic table.

True or False

Which of the following is not one of the classes on the periodic table?

A) Metalloids

B) Nonmetals

C) Metals

D) Gaseous metals

Ten times a number increased by 5 is greater than twelve times a number decreased by one.

What is the name of region in Africa where human fossils are found

What is the relationship between [h3o+] and [oh-=] in terms of greater than less than or equal to in a neutral, acidic, and basic solution?

Which statement about atmospheric pressure is false? A) The warmer the air, the lower the atmospheric pressure. B) Atmospheric pressure prevents water in lakes, rivers, and oceans from boiling away. C) As air becomes thinner, its density decreases.

If an element has three isotopes with known natural abundance percentages, what other information is needed to find the average atomic mass of the element?

A certain amount of hydrogen peroxide was dissolved in 100. mL of water and then titrated with 1.68 M KMnO4. What mass of H2O2 was dissolved if the titration required 19.8 mL of the KMnO4 solution

Give the nuclear symbol for the isotope of phosphorus for which a=31? enter the nuclear symbol for the isotope (e. g., 42he).

What is a substance that cannot be broken down further by chemical means

How does the cow cross the road

Consider these two electron configurations for neutral atoms l and m. l - 1s22s22p63s2 m - 1s22s22p63s13p1 what is the atomic number of l