Physical Science - Module 1 - Pre-Assessment

Which of the following best describes Big Bang Nucleosynthesis?

• the unending expansion of the universe

• the birth of elementary particles in the beginning of time

• a hot plasma in which energy is distributed evenly all throughout

• the formation of atomic nuclei through the combination of sub-atomic particles during the Big Bang

Which of the following is a light element?

• carbon

• helium

• iron

• silicon

What phenomenon leads to the formation of light elements?

• black hole

• supernovae

• big bang

• cosmic ray collisions

Deuterium and Tritium are isotopes of __________.

• hydrogen

• lithium

• beryllium

• helium

Which of the following is NOT correct: “Isotopes of the same element __________.”?

• have the same number of neutrons

• contain the same number of electrons

• have the same atomic number, but different atomic weights

• have different number of neutrons, but the same number of protons

What do you call to the region of the stars when burning of elements occur?

• core

• fission shell

• fusion shell

• both options 2 and 3

In Mendeleev’s periodic law, which was his basis in classifying and arranging elements in the periodic table?

• atomic mass

• number of electrons

• atomic number

• number of neutrons

In Döbereiner’s triads, how did he predict the classification of elements?

• The atomic mass of the first element in the triad is the approximate mean of the atomic masses of the second and third elements.

• The atomic mass of the second element in the triad is the approximate mean of the atomic masses of the first and third elements.

• The atomic mass of the third element in the triad is the approximate mean of the atomic masses of the first and second elements.

• None of the above

Whose idea of classifying and arranging the elements in the periodic table is being used up to the present time?

• Johann Wolfgang Döbereiner

• Dimitri Ivanovich Mendeleev

• John Newlands

• Henry Gwyn Jeffreys Moseley

Which element is being synthesized from molybdenum through nuclear transmutation?

• astatine

• francium

• promethium

• technetium