AQA GCSE Chemistry Paper 1

What is the Charge of an Electron?

• Positive Charge

• Negative Charge

• Neutral Charge

What does the Nucleus of an atom contain?

• Protons

• Electrons

• Neutrons

Tags

NGSS.HS-PS1-8

Which number tells you the amount of protons in an element?

• Atomic Number

• Mass Number

What is an Isotope of a element?

• Element with same number of Protons but a different number of Neutrons.

• Element with same number of Neutrons but a different number of Protons.

What is a compound?

• A substance formed from a two or more elements held by chemical bonds

• A mixture of two or more chemicals which provides a useful outcome

Tags

NGSS.MS-PS1-1

What is a Mixture?

• A substance formed from a two or more elements held by chemical bonds

• A mixture of elements or compounds which can be physically separated

What is the first step in developing the modern day model of an atom?

• John Dalton published his ideas about atoms. He thought that all matter was made of tiny particles called atoms, which he imagined as tiny spheres that could not be divided.

• J J Thomson carried out experiments and discovered the electron. He made the plum pudding model of the atom. In this model, the atom is a ball of positive charge with negative electrons embedded in it.

• Ernest Rutherford did the alpha scattering experiment through which he discovered that the mass of an atom is concentrated at its centre and the nucleus is positively charged. He called it the nuclear model.

• Niels Bohr did calculations that led him to suggest that electrons orbit the nucleus in shells. The shells are at certain distances from the nucleus.

• James Chadwick found evidence for the existence of particles in the nucleus with mass but no charge. These particles are called neutrons.

What is the second step in developing the modern day model of an atom?

• John Dalton published his ideas about atoms. He thought that all matter was made of tiny particles called atoms, which he imagined as tiny spheres that could not be divided.

• J J Thomson carried out experiments and discovered the electron. He made the plum pudding model of the atom. In this model, the atom is a ball of positive charge with negative electrons embedded in it.

• Ernest Rutherford did the alpha scattering experiment through which he discovered that the mass of an atom is concentrated at its centre and the nucleus is positively charged. He called it the nuclear model.

• Niels Bohr did calculations that led him to suggest that electrons orbit the nucleus in shells. The shells are at certain distances from the nucleus.

• James Chadwick found evidence for the existence of particles in the nucleus with mass but no charge. These particles are called neutrons.

What is the third step in developing the modern day model of an atom?

• John Dalton published his ideas about atoms. He thought that all matter was made of tiny particles called atoms, which he imagined as tiny spheres that could not be divided.

• J J Thomson carried out experiments and discovered the electron. He made the plum pudding model of the atom. In this model, the atom is a ball of positive charge with negative electrons embedded in it.

• Ernest Rutherford did the alpha scattering experiment through which he discovered that the mass of an atom is concentrated at its centre and the nucleus is positively charged. He called it the nuclear model.

• Niels Bohr did calculations that led him to suggest that electrons orbit the nucleus in shells. The shells are at certain distances from the nucleus.

• James Chadwick found evidence for the existence of particles in the nucleus with mass but no charge. These particles are called neutrons.

What is the fourth step in developing the modern day model of an atom?

• John Dalton published his ideas about atoms. He thought that all matter was made of tiny particles called atoms, which he imagined as tiny spheres that could not be divided.

• J J Thomson carried out experiments and discovered the electron. He made the plum pudding model of the atom. In this model, the atom is a ball of positive charge with negative electrons embedded in it.

• Ernest Rutherford did the alpha scattering experiment through which he discovered that the mass of an atom is concentrated at its centre and the nucleus is positively charged. He called it the nuclear model.

• Niels Bohr did calculations that led him to suggest that electrons orbit the nucleus in shells. The shells are at certain distances from the nucleus.

• James Chadwick found evidence for the existence of particles in the nucleus with mass but no charge. These particles are called neutrons.