CSS - PMS - CCE - PCS - Everyday Science
Basic Chemistry and Atomic Structure
What is the chemical symbol for Lithium?
A. He
B. Hg
C. S
D. Li
Correct Answer: D
Lithium has symbol Li.
CSS - PMS - CCE - PCS - Everyday Science
Basic Chemistry and Atomic Structure
Which element has atomic number 2?
A. Carbon
B. Helium
C. Uranium
D. Copper
Correct Answer: B
Atomic number 2 is Helium.
CSS - PMS - CCE - PCS - Everyday Science
Basic Chemistry and Atomic Structure
What is the chemical symbol for Helium?
A. S
B. Ca
C. Be
D. He
Correct Answer: D
Helium has symbol He.
CSS - PMS - CCE - PCS - Everyday Science
Basic Chemistry and Atomic Structure
Which element has atomic number 1?
A. Mercury
B. Platinum
C. Hydrogen
D. Beryllium
Correct Answer: C
Atomic number 1 is Hydrogen.
CSS - PMS - CCE - PCS - Everyday Science
Basic Chemistry and Atomic Structure
What is the chemical symbol for Hydrogen?
A. B
B. Ba
C. H
D. Zn
Correct Answer: C
Hydrogen has symbol H.
CSS - PMS - CCE - PCS - Everyday Science
Basic Chemistry and Atomic Structure
One mole contains approximately:
A. 1.60×10^-19 entities
B. 9.81×10^2 entities
C. 6.022×10^23 entities
D. 3.00×10^8 entities
Correct Answer: C
Avogadro's constant is about 6.022×10^23.
CSS - PMS - CCE - PCS - Everyday Science
Basic Chemistry and Atomic Structure
Metallic bonding is described as metal ions in a sea of:
A. water molecules
B. delocalized electrons
C. localized protons
D. neutrons
Correct Answer: B
Metals have delocalized electrons.
CSS - PMS - CCE - PCS - Everyday Science
Basic Chemistry and Atomic Structure
An ionic bond is attraction between:
A. two neutrons
B. photons
C. oppositely charged ions
D. identical neutral atoms only
Correct Answer: C
Ionic bonding is electrostatic attraction.
CSS - PMS - CCE - PCS - Everyday Science
Basic Chemistry and Atomic Structure
A covalent bond involves:
A. loss of nuclei
B. transfer of neutrons
C. sharing of protons
D. sharing of electron pairs
Correct Answer: D
Covalent bonds share electrons.
CSS - PMS - CCE - PCS - Everyday Science
Basic Chemistry and Atomic Structure
Group 18 elements are:
A. alkaline earth metals
B. metalloids
C. halogens
D. noble gases
Correct Answer: D
Group 18 are noble gases.
CSS - PMS - CCE - PCS - Everyday Science
Basic Chemistry and Atomic Structure
Group 17 elements are:
A. lanthanides only
B. noble gases
C. alkali metals
D. halogens
Correct Answer: D
Group 17 are halogens.
CSS - PMS - CCE - PCS - Everyday Science
Basic Chemistry and Atomic Structure
Group 1 elements are:
A. noble gases
B. halogens
C. transition gases
D. alkali metals
Correct Answer: D
Group 1 are alkali metals.
CSS - PMS - CCE - PCS - Everyday Science
Basic Chemistry and Atomic Structure
The nucleus contains mainly:
A. protons and neutrons
B. electrons and photons
C. electrons only
D. molecules
Correct Answer: A
Nucleus contains nucleons.
CSS - PMS - CCE - PCS - Everyday Science
Basic Chemistry and Atomic Structure
Charge on a neutron is:
A. +2
B. 0
C. +1
D. −1
Correct Answer: B
Neutron is neutral.
CSS - PMS - CCE - PCS - Everyday Science
Basic Chemistry and Atomic Structure
Charge on an electron is:
A. +2
B. 0
C. +1 elementary charge
D. −1 elementary charge
Correct Answer: D
Electron is negatively charged.
CSS - PMS - CCE - PCS - Everyday Science
Basic Chemistry and Atomic Structure
Charge on a proton is:
A. −1 elementary charge
B. variable
C. 0
D. +1 elementary charge
Correct Answer: D
Proton is positively charged.
CSS - PMS - CCE - PCS - Everyday Science
Basic Chemistry and Atomic Structure
Isotopes of the same element have the same:
A. number of neutrons
B. physical mass
C. mass number
D. number of protons
Correct Answer: D
Isotopes share atomic number.
CSS - PMS - CCE - PCS - Everyday Science
Basic Chemistry and Atomic Structure
Mass number equals:
A. electrons plus neutrons
B. protons plus neutrons
C. shells plus orbitals
D. protons plus electrons
CSS - PMS - CCE - PCS - Everyday Science
Basic Chemistry and Atomic Structure
In a neutral atom, electrons equal:
A. Protons
B. Isotopes
C. Neutrons
D. Orbitals
Correct Answer: A
Neutral atoms have equal protons/electrons.
CSS - PMS - CCE - PCS - Everyday Science
Basic Chemistry and Atomic Structure
Atomic number equals number of:
A. Nucleons only
B. Neutrons
C. Protons
D. Electron shells
Correct Answer: C
Atomic number is proton number.