17040341
Descripción
Fichas por Catherine Helen Claisse, actualizado hace más de 1 año
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Creado por Catherine Helen Claisse
hace casi 6 años
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| Pregunta | Respuesta |
| What is the relative charge of a NEUTRON? What is its relative mass? | The NEUTRON relative charge is 0. Remember, NEUTRONS are NEUTRAL. Simple. The relative mass of a NEUTRON is 1. |
| Explain what is meant by the term "ISOTOPES". | ISOTOPES are different forms of the same ELEMENT, which have the same number of PROTONS but different numbers of NEUTRONS. |
| True or false? Most of the mass of an ATOM is located in the NUCLEUS. | True. ELECTRONS have virtually no mass. |
| Why do ATOMS have no charge? | ATOMS have the same number of PROTONS as ELECTRONS. Because the charges on PROTONS (+1) and ELECTRONS (-1) are opposite and equally sized, they cancel each other out. |
| How many NEUTRONS does an ATOM of the ELEMENT on the left have? | Number of NEUTRONS = MASS number - ATOMIC number = 88-38=50. |
| Why is the RELATIVE ATOMIC MASS of CHLORINE not a whole number? | CHLORINE has more than one ISOTOPE. RELATIVE ATOMIC MASS is an average that takes into account the different MASSES and ABUNDANCES of all the ISOTOPES that make up an ELEMENT. |
| Freda is building a model of an ATOM. She wants to use her prize turnip as the NUCLEUS. The turnip has a RADIUS of 20cm. What will the RADIUS of the whole ATOM be? | The RADIUS of an ATOM is around 10,000 times the size of the RADIUS of the NUCLEUS. So 20 cm x 10,000 = 200,000 cm (or 2 km - hopefully Freda has a large garden). |
| TIP: YOU CAN'T TRUST ATOMS - THEY MAKE UP EVERYTHING. BUT TRUST ME ON THIS, YOU NEED TO KNOW YOUR PROTONS FROM YOUR NEUTRONS IF YOU WANT TO UNDERSTAND ALL THIS CHEMISTRY STUFF. SORRY. | :-) |
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