Question

1. alkali metals can be very ________ with oxygen or water.
2. elements in the same family share the same # of ________ electrons.
3. the transition ______ are in the middle of the table.
4. metals can have 1, 2, 3 or 4 _______________.
5. transition metals usually give away __________.
6. of the 109 known elements ____ are metals. ( actually 118 as of 4/01)
7. the 1st physical property of all metals is ___________.
8. ductile means that metal can be drawn into thin ________.

Explanation:

These questions are about the periodic table and properties of elements, which falls under Chemistry (a subfield of Natural Science). Let's answer each:

1. Alkali metals are highly reactive with oxygen or water, so the word is "reactive".
2. Elements in the same family (group) have the same number of valence electrons.
3. Transition metals are in the middle of the periodic table, so "metals".
4. Metals can have 1, 2, 3, or 4 valence electrons (they tend to lose these).
5. Transition metals usually give away electrons (multiple, variable, but generally electrons).
6. Most elements are metals; of ~118, over 80 are metals (the answer is "most" or a number, but contextually "most" or a specific count—historically, "over 80" or "most", but the blank likely expects "most" or a number like "80+" or "the majority").
7. The first physical property of all metals is luster (shiny appearance).
8. Ductile means a metal can be drawn into thin wires.

Answer:

1. reactive
2. valence
3. metals
4. valence electrons
5. electrons (or multiple electrons)
6. most (or a specific number like 80+; historically, "over 80" or "the majority")
7. luster (or shiny)
8. wires