關(guān)于元素周期表的幾個(gè)英語(yǔ)問(wèn)題!懂英語(yǔ)和化學(xué)的進(jìn)~
(iv)The elements in thr first vertical column are called the ________(Alkali metals?對(duì)吧)and the reactivity of these elements ______________on moving down the column while those in column 7 are called the ______________and the reactivity of these elements ____on moving down the column
(V) elements in the last column are very unreactive and are called the ______(Noble gases)是嗎?
(VI) which elements in column 7of the periodic table will react most vigorously with the element sodium(in column 1)?_______________________
(VII) what substance will be formed as a result of the reaction shown im(VI)
___________________.
再來(lái)個(gè)
some chlorine gas (cl2）was bubbled slowly through a colourless solution of potassium bromide (KBr) what would you observe?