Test predictiv

Test predictiv

8th Grade

10 Qs

quiz-placeholder

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Test predictiv

Test predictiv

Assessment

Quiz

Chemistry

8th Grade

Practice Problem

Hard

Created by

Manuela Donici

Used 34+ times

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10 questions

Show all answers

1.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Media Image

Simbolul chimic pentru elementul potasiu este:

P

Po

Na

K

2.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Media Image

Atomii elementului calciu contin urmatorul numar de particule elementare:

20 de electroni si 40 de protoni

20 de electroni si 40 de neutroni

40 de electroni si 20 de protoni

20 de electroni si 40 de nucleoni

3.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Media Image

Cei 8 electroni ai atomului de O sunt repartizati in invelisul cu electroni astfel:

K2L8

K2L4M2

K2L6

K2L2M4

4.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Media Image

Elementul care are 4 electoni pe stratul 3 sau M spunem ca ocupa urmatorul loc in SP:

G: a III-a A, P: a 4-a

G: a III-a B, P: a 4-a

G: a IV-a A, P: a 3-a

G: a IV-a B, P: a 3-a

5.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Media Image

Elementul Li are configuratia electronica: K2L1. Pentru a ajunge la structura stabila Li prefera sa:

cedeze 1 electon

accepte 7 electroni

nici nu accepta, nici nu cedeaza avand structura stabila

accepte 3 electroni

6.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Denumirea substantei cu formula chimica NaNO3 este:

azutura de sodiu

azotit de natriu

azotat de nitrogen

azotat de sodiu

7.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Formula chimica pentru hidroxid de cupru (II) este:

CuOH

CuO

Cu2OH

Cu(OH)2

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