What is the best explanation for why a particle is striking
point x?
this image shows a stream of positively charged particles
being directed at gold foil. the positively charged particles
are called "alpha particles and each one is like a nucleus
without any electrons.
alpha particles are mostly empty space, so they move in
random directions, and one of these alpha particles can
strike point x.
the gold atoms contain negative electrons, so when
alpha particles strike the gold they keep moving but in
various directions
if an alpha particle hits the gold foil, a gold nucleus splits
and a particle from it flies out at point x.
when the dense, positive alpha particle passes close to
a positive nucleus of gold, the alpha particle repels and
hits the screen at point x

hurry i need

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases . this process does not change the mass number.

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as -decay. in this the mass number remains same.

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.

show the wavelengths of a wave. show the crests of a wave.

less than one you can't create energy