Biology Biology Practice Problems Solutions Library

Atoms Solutions Library

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14 solutions

Atoms

Q. Ionizing radiation does NOT include:A. gamma raysB. UV raysC. X-raysD. cosmic rays

Solved • Aug 21, 2018

Atoms

Q. The smallest chemical unit of an element is a molecule. a. True b. False

Solved • Aug 1, 2017

Atoms

Q. If a fluorine atom has an atomic weight of 16 and another has an atomic weight of 18 then these atoms are: a. enantiomers b. isotopes c. isomers...

Solved • Jul 20, 2017

Atoms

Q. The area around a nucleus where an electron is most likely to be found is called a. electrical space b. an organelle c. polar space d. radioact...

Solved • Jul 18, 2017

Atoms

Q. Atoms in which the number of electrons does not equal the number of protons are known as a. valences b. ions c. isotopes d. molecules e. orbit...

Solved • Jul 18, 2017

Atoms

Q. Which of the following elements’ isotopic ratios are used to make absolute determinations of the time of formation of materials? a. oxygen b. hyd...

Solved • Jul 18, 2017

Atoms

Q. Oxygen ordinarily has 8 protons and 8 neutrons. Another rare form has two extra neutrons. These two forms are a. oxygen ions b. oxygen isotopes ...

Solved • Jul 18, 2017

Atoms

Q. Ordinary oxygen has an atomic mass number of 16 and an atomic number of 8. This means that the number of neutrons in this type of oxygen is a. 24 ...

Solved • Jul 18, 2017

Atoms

Q. The atomic number of an element is equal to the number of a. protons only b. neutrons only c. protons plus electrons d. protons plus neutrons ...

Solved • Jul 18, 2017

Atoms

Q. An electron a. has one negative charge b. has 1/1840 Dalton of mass c. is found in an area around the nucleus, called the orbital d. only a and...

Solved • Jul 18, 2017

Atoms

Q. A proton a. has one positive charge b. has one Dalton of mass c. is found in the nucleus of the atom d. only a and b are true e. a, b, and c a...

Solved • Jul 18, 2017

Atoms

Q. When atoms gain or lose electrons, they become negatively or positively charged. They are known as a. molecules b. isotopes c. ions d. radioact...

Solved • Jul 18, 2017

Atoms

Q. Negatively charged particles of atoms with almost no mass are called a. electrons b. protons c. neutrons d. ions e. polymers

Solved • Jul 18, 2017

Atoms

Q. Organisms are composed of molecules, which are collections of smaller units, called a. molecules b. atoms c. electrons d. polymers e. ions

Solved • Jul 18, 2017