Flashcards
the periodic table
Flashcards do conjunto (6)
- 1Who made the modern periodic table?Dmitri Mendeleev- he left gaps for the unknown elements
- 2What determines an element's position on the periodic table?The atomic number
- 3What are the columns of the periodic table called?groups
they are numbered, and an element's group number is the same as the number of electrons in its outer shell - 4True or False all elements in a group have similar chemical propertiesTrue.
- 5How do they react? 1) metals 2) non-metals 3) noble gases1) by losing electrons
2) by gaining electrons
3) very unreactive due to their stable electronic structures - 6What does an element's period (horizontal row) tell us?An element's period number is the same as the number of occupied energy levels
Informações
- Descrição
- • 2.1: development of the periodic table • 2.2: electronic structures
- Criado por
- Farha Idrees
- Visualizações
- 17
- Avaliação