D 2.88 g 17. Elements X and Y react to form a covalent compound with formula XY2.
Which of the following is true?
Unsur X dan unsur Y bertindak balas untuk membentuk satu sebatian kovalen dengan
formula XY2
Antara berikut, yang manakah benar?
X²
Electron arrangement of atom X Electron arrangement of atom Y
Susunan elektron atom X
Susunan elektron atom Y
2.8.2
2.8.7
2.4
2.6
A
B
C
2.5
2.7
D
2.1
2.7

Which type of reaction always has an element and a compound as reactants

What can be added to the examples section of each circle? endothermic: ice melting into water, and a heat pack becoming warm exothermic: a glow stick glowing, and fireworks exploding endothermic: ice melting into water, and an instant ice pack turning cold exothermic: fireworks exploding, and gasoline burning endothermic: a glow stick glowing, and a heat pack becoming warm exothermic: an instant ice pack turning cold, and ice melting into water endothermic: gasoline burning, and an instant ice pack turning cold exothermic: ice melting into water, and an instant ice pack turning cold

Name the element in group 17, period 2. (periodic table)