WRITTEN TEST IN SCIENCE 8 - QUARTER 3, SY 2021-2022 - ASSESSMENT 4

What would the result be if halogens gain an electron?

• The outermost energy level will be half filled with electrons.

• The outermost energy level is not completely filled with electrons.

• The outermost energy level is filled with 8 electrons and become stable.

• The outermost energy level is filled with 6 electrons and become unstable.

What does the number above the element symbol represents?

• Atomic mass

• Atomic number

• Element name

• Number of isotopes

Who developed the Modern Periodic Table?

• Aristotle

• Dmitri Mendeleev

• Johann Dobereiner

• John Newlands

How would you identify an alkali metal?

• They possess a characteristic of metal and a non-metal.

• They are silvery white color and tarnish on contact with air.

• They are colorless, odorless and almost completely nonreactive.

• They are extremely reactive when in contact with water and acids.

How are elements arranged in the Periodic Table?

• Increasing atomic radii

• Increasing atomic masses

• Decreasing atomic masses

• Increasing atomic numbers

Which group of elements best conducts electricity?

• Metal

• Metalloid

• Noble gas

• Non-metal

Which term is used to the vertical columns of the periodic table?

• Group

• Line

• Rows

• Table

How would you describe a metal?

• They are soft and brittle.

• They are gases at room temperature.

• They are not conductors of electricity.

• They are good conductors of electric current.

What is the chart that shows classifications of elements according to their properties and increasing atomic numbers?

• Atomic table

• Element table

• Group table

• Periodic table

Which of the following sets of elements have similar chemical properties? Refer to the Periodic Table below.

• C, N, P, I, Al

• Fe, Co, K, Pt, Si

• Be, Mg, Ca, Sr, Ba

• He, Ne, Sn, Pb, Hg