A member of the boron family has three valence electrons, while a member of the carbon family has

a. none.

b. five.

c. four.

d. three.

the number below and to the right of an element in a chemical formula. It represents the number of atoms of that element in chemical compound or molecule.

Exit Which of the following is best revealed by the Bohr Model? A. Electrons are found only within the nucleus of an atom. B. Protons orbit the nucleus of an atom in fixed proton shells. C.

A direct-current power supply of low voltage (less than 10 volts) has lost the markings that indicate which output terminal is positive and which is negative.

Manganese nodules are an example of A. Terrigenous sediment B. Biogenous sediment C. Hydrogenous sediment D. Oil products

A balloon is floating around outside your window. The temperature outside is - 13 ∘C, and the air pressure is 0.800 atm. Your neighbor, who released the balloon, tells you that he filled it with 3.00 moles of gas.

1. A liquid is matter because it a) is hard, b) has its own shape, c) has mass and takes up space. d) living things could not survive without it.

Which of the following molecules is amphipathic? A) CH3CH2OH B) CH3 (CH2) 10CO2H C) CH3 (CH2) 10CH3 D) CH3CO2H

Considering the following precipitation reaction: Pb (NO3) 2 (aq) + 2KI (aq) → PbI2 (s) + 2KNO3 (aq) Which ion would NOT be present in the complete ionic equation?

What does the symbol C p stand for?

Which of the following is not true of science? 1. Science offers proof of a claim 2. Science is a way of knowing 3. Science is a process 4. Science provides support or fails to provide support to claim