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Osnove kemije

Total questions: 5

Worksheet time: 3mins

Name
Class
Date
1.

Što označava kemijski simbol Pb?

a)

kemijski element živu

b)

kemijski element platina

c)

kemijski element olovo

d)

kemijski element bor

2.

U atomskoj jezgri nalaze se:

a)

elektroni

b)

protoni

c)

neutroni

d)

ioni

3.

Vodoravni redovi u PSE zovu se:

a)

periode

b)

skupine

c)

metali

d)

elementarne tvari

4.

Prikazane slike prikazuju:

a)

elementarne tvari

b)

kemijske spojeve

c)

hidratne soli

d)

kiseline i lužine

5.

Protonski broj atoma aluminija je 13, a maseni broj atoma aluminija je 27. Koliko neutrona sadrži jezgra tog atoma?

a)

27

b)

13

c)

14

d)

1

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