Some covalent compounds have giant structures, these structures are called lattices. Examples of giant structures include diamond. They are very strong so the melting and boiling point is very high.
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Electronic structures
The electrons occupy the lowest availability energy levels. They fill up each shell in turn. 2 electrons go in the first (except 'H' has only 1), up to 8 in the second, the third accepts 8 electrons.
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A Gene
A gene is a length of DNA that carries the code for making one protein.
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Mitosis
The cell divides once, two cells are made. The new cells have the same number of chromosomes as the original cell. This is how new body cells are made. It happens in all parts of the body.
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Meiosis
the cell divides twice, four cells are made. The new cells have half the number of chromosomes as the original cell. This is how gametes are made, it only happens in the testes and ovaries.
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Momentum
All moving objects have momentum (momentum(kgm/s)=Mass(kg)xVelocity(m/s)). Momentum has a direction because velocity has magnitude and direction.
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Other cards in this set
Card 2
Front
The electrons occupy the lowest availability energy levels. They fill up each shell in turn. 2 electrons go in the first (except 'H' has only 1), up to 8 in the second, the third accepts 8 electrons.
Back
Electronic structures
Card 3
Front
A gene is a length of DNA that carries the code for making one protein.
Back
Card 4
Front
The cell divides once, two cells are made. The new cells have the same number of chromosomes as the original cell. This is how new body cells are made. It happens in all parts of the body.
Back
Card 5
Front
the cell divides twice, four cells are made. The new cells have half the number of chromosomes as the original cell. This is how gametes are made, it only happens in the testes and ovaries.
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