Which one of these statements is true about the items that make up the atom?
- The negative protons and neutral neutrons are found in the nucleus while there are positive electrons orbiting the nucleus
- The protons, neutrons, and electrons are all found in the nucleus.
- The positive protons and neutral neutrons are found in the nucleus while there are negative electrons orbiting the nucleus
- Protons and electrons are found in the nucleus while the neutrons orbit the nucleus.
An electron is removed from an atom. This turns it into
- a new element
- an isotope
- a negatively charged ion
- a positively charged ion
The relative masses of electrons are as follows:
- the proton and neutron have a relative mass of 1, while the electron has a mass of 1/1800
- the proton and neutron have a relative mass of 1, while the electron has a mass of 1
- the proton and neutron have a relative mass of 1, while the electron has a mass of 1800
- the electron and neutron have a relative mass of 1, while the proton has a mass of 1/1800
The charges on the proton, the neutron, and the electron are as follows:
- the proton has a charge of +1 and neutron has a charge of 0, while the electron has a charge of +1
- the proton has a charge of +1 and neutron has a charge of 0, while the electron has a charge of -1
- the proton has a charge of -1 and neutron has a charge of 0, while the electron has a charge of +1
- the proton has a charge of +1 and neutron has a charge of -1, while the electron has a charge of 0
The number of protons in an element is called:
- the mass number
- the nucleon number
- the atomic number
- the isotope number
If an extra proton is added to the nucleus of an element:
- a new isotope is formed
- a positive ion is formed
- an alpha particle is formed
- a new element is formed
An alpha particle consists of
- a helium atom
- a helium nucleus
- a helium ion
- a helium isotope
A beta particle is:
- a neutron
- a proton
- an electron from the nucleus
- an electron from the electron shells
The plum pudding model of the atom states that:
- Electrons are held in a matrix of positive charge
- Protons are held in a matrix of negative charge.
- Electrons and neutrons are held in a matrix of positive charge.
- There is a central nucleus.
Which one of these did Rutherford's Alpha scattering experiment NOT show?
- The nucleus is very small
- Most of the atom is empty space
- The nucleus is positively charged
- There are neutrons in the nucleus.