# WordPress at ScienceGeek.net

## First Five for January 12 and 13

### Identify the missing particle in the following equation. What type of decay is taking place?

$_{92}^{235}\textrm{U} \to\; _{90}^{231}\textrm{Th}\; +$

### Identify the particle formed when an atom of aluminum-28 undergoes beta decay.

Posted in Chemistry, First Five

## First Five for January 10 and 11

### Draw Lewis electron dot structures for the following diatomic molecules:

#### Hydrogen (H2), nitrogen (N2), Oxygen (O2), Fluorine (F2)

Posted in Chemistry, First Five

## First Five for January 9

### Match the vocabulary term on top with the definition below.

#### _____________________A repeatable procedure that is used to test a hypothesis

Posted in Chemistry, First Five

## First Five for December 8 and 9

### Draw Lewis electron dot structures for the following diatomic molecules:

• #### N2

Posted in Chemistry, First Five

## First Five for December 6 and 7

### Write the electron configuration notation for a sulfide ion.

Posted in Chemistry, First Five

## First Five for December 5

### Assume that circle “A” represents the radius of an atom of chlorine.

3. #### Which circle might represent an atom of fluorine?

Posted in Chemistry, First Five

## First Five for December 1 and 2

Write the correct formula for each of the following compounds:

• Sulfur trioxide
• Sodium sulfide
• Carbon tetrachloride
• Aluminum chloride
• Diphosphorus pentoxide
• Barium phosphide
Posted in Chemistry, First Five

## First Five for November 29 and 30

### Put these elements in order of increasing atomic radius:

2. #### Tellurium (Te), Oxygen (O), Selenium (Se), Sulfur (S)

Posted in Chemistry, First Five

## First Five for November 28

5. ### What is the formula and name of the ion that this atom forms?

Posted in Chemistry, First Five

## First Five for November 17 and 18

• ### chromium (#24)

Posted in Chemistry, First Five