Electron Configuration and Valence Electrons. The electrons in an atom fill up its atomic orbitals according to the Aufbau Principle; Aufbau, in German, means building up..ach element has a number of valence electrons equal to its group number on the Periodic Table. This table illustrates a number of interesting, and complicating, features of electron configuration. Figure %: The periodicity of valence electrons. First, as electrons become higher in energy, a shift takes place.
I took the pregnancy test early at 2 & 3 weeks pregnant, and it came up negative twice. Yet I could feel something was different about my body, even though I had my cycle it fell short a few days, and was very light. Afterwards, I had breast tenderness, and dizziness.
Most home pregnancy tests will give accurate results if you test at the time your period would normally be due, about two weeks after you ovulate. A test may be negative for several reasons. You may not be pregnant.Or, you may have ovulated later than you thought, and not be as far along in pregnancy as you thought.ou can get a negative hcg test and still be pregnant at 5 weeks.. From my experience, I had about 10 false pregnancy tests and even a false blood test.. On January 17 I had a Negative BLOOD TEST..