assessment- flame test

1. Which combination describes the flame color of the compound when heated?

• . A.Sodium chloride – red

• B. Copper (II) sulfate – violet

• C. Potassium chloride – blue

• D. Boric acid – green

2.Which statement is incorrect?

• A. Orbital is a region in an atom where an electron can be found

• B. An electron can emit energy when it jumps to a high energy level.

• C. An electron can absorb energy when it jumps to a higher energy level.

• D. Filling of electrons in an atom starts from a low energy level to the highest energy level

1. Which explain the spectral line given off by an atom of a substance when heat is applied directly to it?

• A. The electron is removed from the atom.

• B The electron moves faster around its orbit.

• C.The electron absorbs energy and jumps to a higher energy states

• D. The electrons which jumped to a higher energy state returns to a lower energy state.

4.What do the atomic spectra of elements prove about the atom?

• . A.That atom is charged

• B.That atom contains a nucleus

• C.That atom has electrons that are negatively charged.

• .

  D.That atom has electrons that are found in definite energy levels.

5. Which requires absorption of energy?

• A.an electron coming nearer the nucleus

• B. The electron going farther to the nucleus

• C. an electron moving around the nucleus in its normal path.

• D. None of the above.