NAT Review (Physical Sciences II)

What is the most abundant element in the universe?

• Hydrogen

• Carbon

• Oxygen

• Helium

How are elements organized in the modern periodic table?

• Alphabetically

• By atomic number

• By atomic mass

• At random

Which element has the atomic number 1?

• Hydrogen

• Oxygen

• Carbon

• Helium

What is the focus of understanding aspects of chemical changes?

• How materials are related to their properties and structures

• Exploring the function and structure of biological macromolecules

• Understanding the amount of energy involved in a reaction

• Analyzing how fast a reaction takes place

Which property of an element determines its position in the periodic table?

• Atomic mass

• Atomic number

• Electronegativity

• Ionization energy

Which of the following describes the process of element formation during the Big Bang?

• Fusion of pre-existing elements

• Fission of pre-existing elements

• Spontaneous creation of elements

• Disintegration of existing elements

How were elements distributed in the early universe?

• Evenly throughout space

• Concentrated in galaxies

• Concentrated in interstellar clouds

• Randomly distributed

How do materials and their properties and structures relate to each other?

• Materials have no relation to their properties and structures

• Materials can have different properties based on their structures

• Properties and structures have no effect on the behavior of materials

• Properties and structures are not important when studying materials

Which of the following is a focus of understanding the function and structure of biological macromolecules?

• How fast a reaction takes place

• How much reactants are needed and how much products are formed in a reaction

• How energy is harnessed

• How the function of biological macromolecules is determined by their structure

What is the atomic mass of an element equal to?

• The total number of protons in an atom

• The total number of neutrons in an atom

• The combined mass of all the isotopes of an element

• The mass of an atom when it is at rest