Among the groups of elements listed below which have the same number of electrons in their highest occupied energy levels?

A. Li, B, C, F

B. Na, Mg, Al, S

C. K, Ca, Rb, Sr

D. N, P, As, Sb

What does the electron sea model for metals suggest? A) valence electrons drift freely around the metal anions B) valence electrons are anchored to specific metal cations C) valence electrons drift freely around the metal cations D) electrons idle

What is the mass of a gold bar that is 7.379*10^-4 m^3 in volume?

What is an isotope? How does one isotope differ from another isotope

Which of the following best explains the polarity of water (H2O) ? OA. Since the oxygen atom has more electrons than the hydrogen atoms, it is negatively charged. ОВ.

A student calculates the density of iron as 6.8 g/cm3 using lab data for mass and volume. A handbook reveals that the correct value is 7.39 g/cm3. What is the percent error?

Which statement is true for a pure compound but NOT true for a pure element?

Which one is uncelluar and which is multicelluar? crab or pond organism

An atom of lithium loses an electron. What is the effect of this event? Group of answer choices The atom of a different element is formed. The atom of lithium acquires no charge. The atom of lithium becomes a positively charged ion.

Water interacts with polar substances like - OH groups but not with non-polar substances like methyl (-CH3) or ethyl groups (-CH2). Using this information, select the molecules that will easily dissolve in water based on polarity not on size.

Which of the following statements is not considered weather? The wind is blowing 20 miles per hour right now in Kansas. It is raining in Seattle. It is usually humid in Florida. It is snowing in Colorado.