Werkblad Scheikunde voor toelatingsexamens verpleegkunde met antwoorden

Which three elements make up carbohydrates?

1. AHydrogen, nitrogen and phosphorus
2. BCarbon, hydrogen and nitrogen
3. CCarbon, hydrogen and oxygen
4. DCarbon, nitrogen and sulfur

What is the half-life of a radioactive isotope?

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

Welke stof is een base?

1. AZoutzuur (HCl)
2. BCitroensap (citroenzuur)
3. CAzijn (azijnzuur)
4. DNatriumhydroxide (NaOH)

A patient's arterial blood pH is 7,25. How is this described?

1. AAcidosis
2. BNormal
3. CAlkalosis
4. DNeutral

In 2KClO₃ → 2KCl + 3O₂, how many moles of O₂ form from 4 mol of KClO₃?

1. A6 mol
2. B8 mol
3. C4 mol
4. D3 mol

What is the oxidation number of oxygen in most of its compounds?

1. A+2
2. B−2
3. C−1
4. D0

A catalyst is added to an exothermic reaction. How does the energy diagram change?

1. AThe products end up at a lower energy, so more heat is released
2. BThe reaction becomes endothermic
3. CThe peak is lower, but the energy of reactants and products stays the same
4. DThe reactants start at a higher energy

Which element has the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁵?

1. ASulfur
2. BArgon
3. CFluorine
4. DChlorine