Which of the following materials is a metalloid or semi-metal (has some metallic properties and some properties similar to non-metals) ?

Group of answer choices

Na

silicon (Si)

NaCl

selenium (Se)

The electron configurations of some elements are given. Based on the electron configurations, which elements can likely form ions with multiple charges? zinc [Ar] 3d10 4s2 iron [Ar] 3d6 4s2 sodium [Ne] 3s1 cobalt [Ar] 3d7 4s2 silver [Kr] 4d10 5s1

Why do metals tend become cations?

Liquid hexane CH3CH24CH3 reacts with gaseous oxygen gas O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O. If 0.273g of water is produced from the reaction of 0.86g of hexane and 0.94g of oxygen gas, calculate the percent yield of water.

Iron metal reacts with chlorine gas according to the equation:2Fe (s) + 3Cl2 (g) →2FeCl3 (s) If 25.6 g of iron react completely, how much FeCl3 will be formed?

Which type of reaction is FeS+2 HCI--> FeCI2 + H2S?

Which mixture can be separated by using the equipment shown below?

El agua de Mar es una mezcla homogenea o disolucion Y El agua corriente Y El aire Y LA lejia Y Los refrescos con gas Y El suero fisiologico Y Las monedas Y LA leche Y LA gelatina Y Los productos de higiene Y El merengue

The component which dissolves in a solution is called the ...

If this fossil is 65 million years old, what could this fossil suggest about organisms alive today? A. If it is similar to any two modern species, it could be a common ancestor of these species. B.

A compound composed of electrically chargerd atoms is called?