Chemia na egzaminy wstępne na pielęgniarstwo: karta pracy z odpowiedziami
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Imię: ____________________ Data: ____________
1.Łatwy
Where are the transition metals located on the periodic table?
AAbove the noble gases
BIn group 18 on the far right
CIn group 1 on the far left
DIn the central block, groups 3 to 12
2.Łatwy
What are enzymes?
AFats that form most of the cell membrane
BBiological catalysts, usually proteins
CMinerals that build bone
DSugars that store energy in the liver
3.Łatwy
What is a molecule?
AA mixture of two different elements
BA single atom with a positive charge
CTwo or more atoms held together by covalent bonds
DThe nucleus of an atom
4.Średni
Atom magnezu traci dwa elektrony. Jaki jon powstaje?
AMg⁺
BMg²⁻
CMg²⁺
DMg⁻
5.Średni
Ile moli znajduje się w 88 g dwutlenku węgla (masa molowa 44 g/mol)?
A3872 mol
B2 mol
C0,5 mol
D44 mol
6.Średni
How does ionisation energy (the energy needed to remove an outer electron) generally change from left to right across a period?
AIt decreases
BIt first falls, then rises sharply
CIt stays the same
DIt increases
7.Trudny
Diamond is extremely hard and has a very high melting point. Which explanation is correct?
AIt is made of separate small molecules with strong forces between them
BIt contains delocalised electrons like a metal
CEach carbon is covalently bonded to four others in a giant network
DIt is held together by ionic bonds between C⁺ and C⁻ ions
8.Trudny
When water boils, what is overcome?
AThe forces holding the oxygen nucleus together
BHydrogen bonds between water molecules
CThe ionic bonds between H⁺ and O²⁻
DThe covalent O–H bonds inside each molecule
Klucz odpowiedzi
1. D · In the central block, groups 3 to 12
2. B · Biological catalysts, usually proteins
3. C · Two or more atoms held together by covalent bonds
4. C · Mg²⁺
5. B · 2 mol
6. D · It increases
7. C · Each carbon is covalently bonded to four others in a giant network
8. B · Hydrogen bonds between water molecules
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