Question

how could rutherford determined the centre of atom is postively ?please help fast guys its very important​

Answer 1

IN RUTHERFORD'S GOLD FOIL EXPERIMENT , HE SHOOTED ALPHA PARTICLES WHICH ARE POSITIVELY CHARGED ON GOLF FOIL

OBSERVATION:

VERY FEW PARTICLES REBOUNDED

INFERENCE:

1] ALL THE POSITIVE MASS IS CONCENTRATED IN ONE SPOT{AS THE PARTICLES COMPLETLY REBOUNDED}

2] THE POSITIVE AREA COVERS A SMALL REGION{ VERY FEW PARTICLES REBOUNDED}

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Answer 2

Answer:

Rutherford determined that the atomic nucleus is positive, since he used the He2+ ions i.e. the alpha particles.

Explanation:

The alpha particles were positively charged and as we know the like charges repel was other. Most of the alpha particles at the centre were reflected back completely as 180 degrees which states that there is some sort of repulsive force inside the centre. Hence, the centre is positively charged. I HOPE THIS ANSWER HELPED YA GUYS!