Which element is a metalloid?

a. argon (ar)

b. silicon (si)

c. potassium (k)

d. magnesium (mg)

The representative particle for zinc is the a molecule b atom c gram d formula unit

Explain how the concept of the "survival of the fittest" relates to the theory of evolution.

Based on the periodic table, which of the following groups of elements should have very similar chemical properties? A. potassium (K), aluminum (Al), neon (Ne) B. carbon (C), iodine (I), hydrogen (H) C. lithium (Li), sodium (Na), potassium (K) D.

Why does the pressure inside a container of gas increase?

Of Be3+, Li2+, and He1+ , which would have a line spectrum most similar to that of thehydrogen atom? Explain your reasoning.

Determine the molar mass of an unknown monoprotic acid to two decimal places if 20.01 ml of a 0.098 m naoh solution were used to titrate 0.215 g of the unknown acid

A diatomic molecule with a triple covalent bond is A. H2 B. N2 C. O2 D. Br2 (P. S. The answer turned out to be B. N2)

Consider the following half-reactions: Half-reaction E° (V) I2 (s) + 2e - 2I - (aq) 0.535V 2H + (aq) + 2e - H2 (g) 0.000V Zn2 + (aq) + 2e - Zn (s) - 0.

Where did the longest tsunami form?

Calculate the number of H atoms in 0.190 mole C 6 H 14 O .