A & P: Exam 1: Ch 2.1

On the image, indicate which part of the atom is negatively charged?

Electrons

Which of the following is a property of matter?

Matter can exist in solid, liquid, or gaseous states.

Match the following: Legs moving the pedals of a bicycle

Mechanical energy

What is the most common element in the body?

O

Which of the following is not one of the four basic elements that comprise approximately 96% of a human's body weight?

Potassium

Which of the following best defines potential energy?

Potential energy is stored energy, which has the capacity to do work, but is not presently doing so.

What two parts of the atom are always equal in number in a neutral atom? A model of an atom shows two protons and two neutrons together in the nucleus, with two electrons circling outside of the nucleus

electrons and protons

An atom has an atomic number of 6 and a mass number of 14. How many neutrons does this atom have?

8

Which form of energy is the most useful form of energy in living systems?

Chemical

Ninety-six percent of body weight is made up of __________.

4 elements

Which of the following statements is true concerning the structure of atoms?

An atom loses the unique properties of its element when it is split into its subatomic particles.

Which is true concerning atomic weight?

Atomic weight is the average of the mass numbers of all the isotopes of an element.

Which of the following is true of atoms?

Atoms of any given element will differ from those of all other elements and provide the element its unique physical and chemical properties.

With regards to isotopes, which of the following atomic structures is impossible? Choice A depicts an atom of hydrogen with 1 electron, 1 proton, and 1 neutron. Choice B depicts an atom of hydrogen with 2 electrons and 1 proton. Choice C depicts an atom of hydrogen with 1 electron, 1 proton, and 1 neutron. Choice D depicts an atom of hydrogen with 1 electron, 1 proton, and two neutrons.

B

On the image, indicate where most of the mass of the atom is. Planetary model of a helium atom with the letter A indicating orbiting electrons, letter B indicating protons in the nucleus and letter C indicating neutrons in the nucleus

B (protons) and C (neutrons)

Which statement concerning elements is true?

Each element is composed of more or less identical particles or building blocks, called atoms.

Match the following: Represented by the flow of charged particles along a conductor or the flow of ions across a membrane

Electrical energy

Which statement is true?

Every element's atoms differ from those of all other elements and give the element its unique physical and chemical properties.

Which statement is incorrect concerning radioisotopes?

Ionizing radiation damages tissue by directly damaging organic molecules.

Which of the following is true of an isotope?

Isotopes have the same number of protons, but differ in the number of neutrons they contain.

Which of the following statements about kinetic energy is incorrect?

It is a type of stored energy.

Which subatomic particles are equal in atomic mass?

Protons and neutrons

Which of the following is true concerning atomic number?

The atomic number of any atom is equal to the number of protons in its nucleus.

Which of the following is true concerning mass number?

Using mass number notation, we can identify the number of protons, electrons, and neutrons.