Which Group 14 element is a metalloid?

(1) tin (3) lead

(2) silicon (4) carbon

Q4 describe the change of atomic radio for the elements in period 2, from lithium to neon

Which compound from question 3 would be classified as "organic"? A) H2O b) CCl4 c) NaCl d) Mg3P2 e) N2O5 Why?

Liquid nitrogen is used for: electrosurgery cryosurgery laser surgery

What can you conclude about why Arrhenius bases are considered a limited case of Bronsted-Lowry bases. A) All Arrhenius bases can act as proton acceptors. B) Arrhenius bases release hydronium ions in solution.

In this reaction, what effect does a change in the concentration of substances have on the reverse reaction rate? CaCO3 (s) ⇌ CaO (g) + CO2 (g) A. The rate of the reverse reaction increases with an increase in the concentration of CaCO3 (s). B.

Gases are unique because it is the only phase that can be compressed can flow is composed of moving particles cannot be compressed

In a crystal lattice of an ionic compound, A. Kind of a given charge are clustered together B. Ions are surrounded by ions of the opposite charge C. A sea of electrons surrounds the ions D. Neutral molecules are present

Assuming constant pressure and temperature, how many moles of gas have been added to the initial 3 moles of gas when the volume increases from 2.0 to 4.0 liters? a. 1.5 moles b. 2 moles c. 3 moles d. 6 moles

The chemical symbol for sodium is A. N. B. S. C. Na. D. Sn.

What is the pressure of a mixture of co2, so2, and h2o gasses, if each gas has a partial pressure of 25 kpa?