Werkblad Scheikunde voor toelatingsexamens verpleegkunde met antwoorden

What is the half-life of a radioactive isotope?

1. AHalf the number of protons in the nucleus
2. BHalf the time it takes for all the atoms to decay
3. CThe time taken for the mass of a sample to double in size
4. DThe time taken for half of the radioactive atoms in a sample to decay

What is a dilute solution?

1. AOne in which the solute has reacted with the solvent
2. BOne with a large amount of solute in a little solvent
3. COne with no solvent at all
4. DOne with a small amount of solute in a lot of solvent

What is a cation?

1. AA molecule with no charge
2. BA positively charged ion
3. CA neutral atom
4. DA negatively charged ion

The amino acid glycine has an –NH₂ group and a –COOH group. What are these two groups called?

1. AA phosphate group and a hydroxyl group
2. BA carbonyl group and an ester group
3. CA hydroxyl group and a methyl group
4. DAn amino group and a carboxyl group

Wat is de lading van een chloride-ion?

1. A+7
2. B+1
3. C−2
4. D−1

How does electronegativity change going down a group?

1. AIt doubles with each period
2. BIt increases
3. CIt stays the same
4. DIt decreases

Why does drinking seawater make dehydration worse?

1. ASeawater is hypertonic, so the body loses extra water getting rid of the salt
2. BSeawater is isotonic, so it cannot be absorbed
3. CSeawater is hypotonic, so water rushes into cells and makes them burst
4. DSeawater contains no water molecules the body can use

What is the net ionic equation for the neutralisation of any strong acid by any strong base?

1. AH⁺ + Cl⁻ → HCl
2. BH⁺ + OH⁻ → H₂O
3. CNa⁺ + Cl⁻ → NaCl
4. DH₂ + O₂ → H₂O₂