Week 1 Practice Quiz Flashcards
Which of the following are the largest in size? A) An atom B) A molecule C) A proton D) A neutron E) An electron
B) A molecule
The simplest chemical units of a matter are? A) Atoms B) Molecules C) Protons D) Neutrons E) Electrons
A) Atoms
The atomic number represents the number of? A) Protons in an atom B) Electrons in an ion C) Neutrons in an atom D) Protons and neutrons E) Neutrons and electrons
A) Protons in an atom
All atoms with the same atomic number are grouped into A) Molecules B) Cells C) Compounds D) Elements E) Isotopes
D) Elements
The mass number of an atom indicates the number of A) Protons in the nucleus B) Neutrons in the nucleus C) Electrons in the outer shell D) Protons and neutrons in the nucleus E) Protons and electrons in an atom
D) Protons and neutrons in the nucleus
Elements that have atoms with full outer shells of electrons A) Will form many compounds B) Will normally form anions C) Will normally form cations D) Frequently form hydrogen bonds E) Are inert
E) Are inert
Isotopes of an element differ in the number of A) Protons in the nucleus B) Electrons in the nucleus C) Neutrons in the nucleus D) Electron clouds E) Electrons in energy shells
C) Neutrons in the nucleus
If an isotope of oxygen has 8 protons, 10 neutrons and 8 electrons, it's mass number is A) 26 B) 16 C) 18 D) 8 E) 12
C) 18
Electrons have a \_\_\_\_\_\_ charge; protons have a \_\_\_\_\_\_\_\_ charge; and neutrons have a \_\_\_\_\_\_\_ charge. A) Positive; negative; negative B) Negative; positive; positive C) Negative; positive; neutral D) Negative; neutral; positive E) Negative; neutral; neutral
C) Negative; positive; neutral
The four elements making up about 96% of the body's mass are represented by the symbols A) O, Ca, H, Na B) O, C, H, N C) O, C, He, Na D) O, H, K, N E) O, Ca, H, Ni
B) O, C, H, N
An atom of one element is best distinguished from an atom of another element by the number of: A) Neutrons in the nucleus B) Electrons in the nucleus C) Protons in the nucleus D) Electrons orbiting the nucleus E) Electrons it can lose when bonding
C) Protons in the nucleus
Subatomic particles located around the nucleus of an atom are A) Protons B) Electrons C) Neutrons D) Neutrinos E) Photons
B) Electrons
A neutral atom contains: A) More protons than electrons B) More electrons than protons C) The same number of electrons and protons D) Only neutrons E) None of the above
C) The same number of electrons and protons
Electrons:
A) Comprise the majority of the mass of an atom
B) Are located in the nucleus of an atom
C) Have a positive charge of one
D) Are the subatomic particles most involved in bonding behaviour of atoms
E) Do not participate in the bonding of atoms
D) Are the subatomic particles most involved in bonding behaviour of atoms
Which of the following best describes a proton?
A) One negative charge, no mass, found in orbitals
B) No charge, mass of one, found in nucleus
C) One positive charge, mass of one, found in nucleus
D) Subatomic particle with no electric charge
E) None of the above
C) One positive charge, mass of one, found in nucleus