Which of these elements have an oxidation state of -2? a. hydrogen b. chromium c. iron d. oxygen

Which location-sharing service offers items for users as a gaming component and also allows them to collectively link their check-ins to publish a trip? a. whrrl b. buzzd c. foursquare (this option is wrong i already tried) d. gowalla for plato

List a few alternative options and input and output over the standerd keyboard and monitor. explain their functioning in details.

Anetwork security application that prevents access between a private and trusted network and other untrusted networks