n/s

1. 1. Helps predict the
spatial arrangement of
atoms in a polyatomic
molecule.

2. 2. In 1993, Moseley published a
paper and arrangement of the
elements in the periodic table based
on the atomic numbers, he
used_______________________ to
determine the atomic number of an
element.

3. 3. In 1919, Ernest Rutherford Successfully
carried out a _____________ reaction a
reaction involving the transformation of one
element or isotope into another element he
bombarded alpha particles from regime
directed to the nitrogen nuclei he showed that
the nitrogen nuclei reacted the alpha particles to
form an oxygen nuclei the reaction is written as
shown in the slide.

4. 4. He was English physicist who demonstrated
that atomic number or the number of protons in
an atom determines most of the properties of an
element, he began his study of radioactivity in
Earnest Eduardo for its laboratory but later
decided to explore more on X-rays.

5. 5. The invention of the device called
__________ paved the way for
transmuting one element into
another artificially

6. 6. Are synthetic elements with
atomic numbers higher than that of
Uranium (Z = 92).

7. 7. The first man-
made element.

8. 8. Are elements with atomic
numbers beyond 103.

9. 9. Measure of the relative tendency
of an atom to attract electrons to
itself when chemically combined
with another atom.

10. 10. Refers to “two poles,” meaning
there is a positive and a negative
pole within a molecule.

11. ANSWERS:
1. VALENCE SHELL ELECTRON PAIR REPULSION
THEORY OR VSEPR THEORY
2. X-RAY SPECTROSCOPY
3. NUCLEAR TRANSMUTATION
4. HENRY GWYN-JEFFREYS MOSELEY
5. CYCLOTRON
6. TRANSURANIC ELEMENTS
7. TECHNICIUM
8. SUPERHEAVY ELEMENTS
9. ELECTRONEGATIVITY
10. DIPOLE