Science
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Science - Marcador
Science - Detalles
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48 preguntas
| 🇬🇧 | 🇬🇧 |
| What is an isotope??? | An isotope is an element with more neutrons then protons |
| What is electron configuration | Writing out the electrons on the shell(2,8,8,2) |
| What is atomic number | How many protons are in the atom |
| What is the mass number | The number of protons+neutrons |
| Who was the first person to use the word atom | In 1805 John dalton |
| Who put the periodic table in order of mass | In 1965 John newlands |
| Who put the periodic table in order of mass but left gaps | In 1969 Dmitri Mendeleev |
| What are atoms made up of | Tiny subatomic particles called neutrons electrons and protons |
| What type of microscope is used to see atoms | Electron microscope |
| What does the word subatomic mean | Subatomic means inside the atom |
| In what year was it suggested that electrons orbit the atom | 1913 by Niels Bohr |
| All atoms are neutral which means | There are the same amount of protons and electrons |
| What 2 subatomic particles are in the nucleus( the middle of the atom) | Protons and neutrons |
| What is nuclear formula? | The showing of the atomic and the mass number on the periodic table |
| How do you get the number of neutrons in an atom | Mass number-atomic number |
| What does periodic mean | At regular intervals |
| In what year was the periodic table put in order of mass and by who | 1865, by John newlands |
| What era groups 1,2,7 and 8 called | 1:alkali metals2:alkaline earth metals7:halogens8:noble gasses |
| How is the group number related to the elements | The group number is the number of elements in the outer shell of the elements |
| How are the periods usually labelled | N = 1 etc |
| What does the steps of stairs or the bat line separate | Metals from non metals |
| What are the elements in the middle of the periodic table called | Transition metals/transition elements |
| Elements in group one tend to lose | One electron |
| Elements in group 2 tend to lose | 2 electrons |
| Elements in group 7 tend to gain | 2 electrons |
| Elements in group 8 tend to gain | 1 electron |
| How do ions work | When they lose an electron they form a positively charged atom because there is 1 more protons then electrons same with electrons but negatively |
| What is an ionic bond | The force of an attraction between the ions( negative and positive) bonds the ions together(ionic bond) from the electrons moving from one to the other |
| A compound is when | 2 atoms are chemically combined( has to be different element atoms) |
| A mixture is when | 2 atoms of the same elements join together |
| What is our periodic table in order of | Of increasing atomic number |