Chemistry T-2-Q

1.      Laila needs a replacement for Sodium (Na) for a science experiment. Using the periodic table, which element Laila would use?

• a.  Neon (Ne)

• b.  Xenon (Xe)

• c.  Lanthanum (La)

• d. Potassium (K)

1.      A(n)--------------- is the smallest particle that still can be considered as an element.

• a.  Atom

• b.  Molecule

• c.  Theory

• d.  Isotope

1.       What indicates that an atom has no overall charge?

• a.  The number of protons equals to the number of neutrons

• b.  The number of neutrons equals the number of electrons

• c. The number of protons equals the number of electrons

• d. None of the above

1.      The positively charged particles of an atom are the----------- while the negatively charged particles of

an atom are the---------- --.

• a.  Nucleus – Protons

• b.  Protons – Electrons

• c.  Protons – Neutrons

• d.  Neutrons – Protons

1.      The nucleus of an atom can be described as------------- --.

• a.  Spacious and negatively charged

• b.  dense and positively charged

• c.  Empty and positively charged

• d.  dense and negatively charged

1.      How many neutrons are in an atom of Boron -10? a. 5

 

1.      How many protons are in an atom of Boron- 11?

• 5-5

• 6-3

• 10-10

• 11-11

1.      An atom of Sodium has an atomic number of 11 and a mass number of 22. How many Protons. Neutrons and Electrons are in the atom?

• a.  17 protons, 17 electrons and 20 neutrons

• b. 11 protons, 11 electrons and 11 neutrons

• c. 11 Protons, 11 electrons and 33 neutrons

• d. None of the above

1.      The elements in the top row below the periodic table are known as the----------- --. The most

common element in this period is Lanthanum.

• a. Lanthanides

• b.  Transuraniums

• c.  Actinides

• d.  Hydrogen

1.        ---------- are shown on the left side of the table while------------ are located on the right side of the

periodic table.

 

• a.  Non-Metals – Metals

• b.  Metals – Non-Metals

• c.  Metalloids – Metals

• d.  Metals – Metalloids

All Actinides are radioactive

• T

• F