8ME Summative Assessment 3rd Quarter

Which of the following is the proposed atomic model of Niels Bohr?

• 
• 
• 
• None of the choices

What part of an atom is neutrally charged?

• electron

• nucleus

• proton

• neutron

Which of the following represents the vertical columns in the periodic table?

• Mass number

• Family

• Period

• Atomic number

How many periods are there in the periodic table of elements?

• 7

• 5

• 8

• 6

Which of the following refers to the energy required to remove an electron from an isolated gaseous atom?

• ionization energy

• atomic size

• electronegativity

• electron affinity

Which of the following refers to a group of elements in the periodic table?

• Metalloids

• Non-metals

• Metals

• All of the choices

Comets are made up of frozen gases of water, ammonia, methane and carbon dioxide, as well as small pieces of metallic materials.

• True

• False

Humidity and ocean temperatures of over 26 degrees Celsius are major contributing factors in the formation of typhoons.

• False

• True

• Neither

• Both

The categories of typhoons are based on minimum sustained winds.

• True

• Both

• False

• Neither

Asteroid belt is one of the special regions of the solar system that serve as a boundary of the inner and outer planets.

• True

• False

• Both

• Neither